Number Sense Workbook 5, Part 1

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1 Number Sense Workbook 5, Part 1 page 1 Worksheet NS5-1 page b) s c) s d) s e) ten s f) ten s g) hundreds h) tens i) hundreds j) ones k) ten s l) ones 2. a) s b) tens c) s d) ones e) ten s f) tens g) hundreds h) ones i) s 3. b) 4, 5, 0, 0, 1 c) 0, 3, 6, 9, 9 d) 1, 9, 0 5, 3 e) 0, 0, 5, 4, 6 f) 2, 0, 1, 2, , 60, 300, 4 000, , 30, 500, 8 000, , 70, 200, 3 000, b) 40 c) 400 d) e) f) 40 g) h) a) 500 b) 30 c) d) e) f) 7 g) 5 Worksheet NS5-2 page a) 23 b) 32 c) 95 d) 270 e) 479 f) 9217 g) a) Two hundred forty-five b) Four hundred fifty-one c) Three hundred seventy-eight d) One hundred nine 3. a) Thirty-six b) Four c) Twenty-five d) Nineteen a) Twenty-six b) Three c) Thirty-seven d) Nineteen e) Two hundred thirty-four f) Six hundred ninety-seven g) One hundred twenty-one h) Four six hundred twenty-one i) Twenty-five seven hundred sixty-eight j) Thirty seven nine hundred fifty-four 6. Four one hundred twenty-one Fifty three six hundred seventy-two Fourteen three hundred seventy-eight Ninety-nine nine hundred ninety-nine 7. a) Eigth eight hundred forty-eight b) Seven six hundred thirty c) Eight eight hundred ninety-four d) Fifteen five hundred sixty-two e) Fifteen eight hundred three f) Eleven four hundred forty-five Worksheet NS5-3 page a) 3, 4, 5; 345 b) 2, 5, 3, 253 c) 1, 7, 8; 178 d) 5, 0, 6; Teacher to check. 3. a) 2, 4, 4, 6 = 2446 b) 3, 2, 2, 4 = 3224 c) 2 s + 2 hundreds + 2 tens + 9 ones = Teacher to check the base ten model. 5. a) b) Worksheet NS5-4 page b) 2, 5, 3, 1, 2 c) 2 ten s + 8 s + 5 hundreds + 4 tens + 7 ones 2. b) c) d) e) f) g) a) b) c) d) e) f) g) h) i) j) k) l) m) a) 20 b) 70 c) 800 d) 200 e) 2 f) 20 g) h) 80 i) j) Teacher to check base ten models. a)

2 page 2 b) Teacher to check base ten model one three hundred sixty-five = 1 s + 3 hundreds + 6 tens + 5 ones = Worksheet NS5-5 page a) 6, 40, 800; 6, 50, 800; 856 > 846 b) 7, 20, 300; 7, 20, 400: 427 > b) 3, 2; c) 2, 8; d) 3, 4; a) 2, 3; 134 b) 2, 3; 374 c) 7, 6; 875 d) 3, 2; 238 e) 8, 9; f) 2, 5; g) 5, 6; h) 9, 8; b) c) d) e) f) g) h) i) a) < b) < c) > d) < e) > f) < g) > h) > i) > 6. a) Thirty-five b) 392 c) 81 d) e) Fifty three hundred eighty-five 7. Circle A 8. Teacher to check, answers will vary 9. A 5-digit number is greater than a 4-digit number, except if the first digit is zero. 10. Nine 11. Concepción Worksheet NS5-6 page a) 10 more b) 100 less c) 10 less d) 10 more e) 100 less f) 10 less 2. a) more b) less c) less d) 100 less e) 100 more f) more 3. a) more b) less c) less d) more e) less f) less g) more h) less 4. b) 3, 4; 100 less c) 4, 3; more d) 2, 3; less e) 0, 1; 10 less f) 1, 2; 1 less 5. a) 335 b) c) 692 d) e) f) g) h) i) j) a) 244 b) c) d) e) f) g) 347 h) 673 i) 737 j) k) l) m) n) o) a) 10 b) 100 c) 10 d) 100 e) f) 100 g) 100 h) 10 i) 100 j) k) 100 l) a) 8 538, b) , c) , d) , b) 8, 9; is more than c) 8, 9; is less than Worksheet NS5-7 page a) (i) 438 (ii) is greater b) (i) (ii) is greater 2. a) 78, 79, 87, 89, 97, 98; 98 is greatest b) NOTE: 03 and 04 are equal to 3 and 4, which are 1-digit numbers (so not allowed in list) 4. a) , 34, 40, 43; 43 is greatest b) c) a) < b) > c) > d) > 6. a) b) c) a) b) c) a) , answers may vary, b) , answers may vary, c) , answers may vary, a) 3 183, 3 257, b) , , c) , , d) 3 281, ,

3 page 3 e) , , f) 17, 273, Teacher to check 11. Teacher to check 12. a) 7 b) 4 Worksheet NS5-8 page a) 4, 12; 5, 2 b) 2, 18; 3, 8 2. b) 7, 3 c) 2, 6 d) 8, 0 e) 7, 8 f) 8, 1 g) 1, 9 h) 5, 7 i) 8, 9 3. a) = 8; 3 b) = 8; 2 c) = 5; 1 d) = 9; 9 e) = 9; 4 f) = 9; 0 4. b) 7 hundreds + 4 tens + 7 ones c) 8 hundreds + 7 tens + 8 ones 5. b) = 3; 7 c) = 9; 0 6. b) 5, 2, 1, 4 c) 6 s + 0 hundreds + 3 tens + 1 ones 7. a) 4, 5, 4, 2 b) 3 s + 9 hundreds + 4 tens + 5 ones c) 6 ten s + 5 s + 6 hundreds + 5 tens + 5 ones 8. Yes; by regrouping, he has 4 s, 3 hundreds, 4 tens and 10 ones which is 4 more ones than he needs. Worksheet NS5-9 page b) tens ones b) 5 ones, 1 ten; sum = 85 c) 2 ones, 1 ten; sum = 92 d) 0 ones, 1 ten; sum = 80 e) 5 ones, 1 ten; sum = b) 51 c) 93 d) 95 e) 72 f) 91 g) 61 h) 61 i) 80 j) 106 Worksheet NS5-10 page = 5, 7, 2 = 2, 5, 1 = 7, 12, 3 = 8, 2, 3 2. a) 629 b) 857 c) 919 d) e) a) 653 b) 713 c) 831 d) 649 e) 962 f) a) 825 b) 783 c) 773 d) 348 Worksheet NS5-11 page = 6, 8, 2, 6 = 2, 5, 4, 3 = 8, 13, 6, 9 = 9, 3, 6, 9 2. a) b) c) d) e) a) b) c) d) e) a) b) c) d) e) f) g) h) i) j) a) b) c) d) a) b) c) d) a) = 828 b) = = 1111 c) = 585 d) = e) = = 989 f) = (0) 111 = g) = = = Worksheet NS5-12 page a) 29 b) 6, 15; 29 c) 2, 14: 16 d) 6, 17; b) 6, 18; 39 c) 4, 13; 24 d) 7, 12; 39 e) 5, 16; b) Help! 2 is less than 6 c) OK d) Help! 2 is less than 9 e) OK f) Help! 5 is less than 8 g) OK h) Help! 4 is less than 9 i) Help! 4 is less than 6 j) OK k) Help! 2 is less than 3 l) Help! 1 is less than 7 4. a) 271 b) 5, 17; 485 c) 7, 11; 520 d) 8, 15; a) 127 b) 6, 12; 133 c) 5, 14; 326 d) 8, 10; a) 6, 14, 12; 389 b) 7, 11, 13; 648 3

4 page 4 c) 2, 9, 14; 277 d) 8, 17, 13; b) 3,12; c) 8, 16; d) 5, 15; a) 7, 17; b) 7, 15; c) 5, 12; d) 2, 15; e) 6, 13; f) 7, 12, 4, 12; g) 8, 10, 1, 13; a) b) c) d) a) 642 b) 52 c) 238 d) 741 Worksheet NS5-13 page b) 9 green 2. 6 red c) 6 red Diff: 3 apples Total: 15 apples 8 green d) 5 red R G T Diff: 2 apples Total: 14 apples 4 green Diff: 1 Total: 9 apples How many more? 1 more green than red 6 more red than green 3 more red than green 3. Teacher to check. Worksheet NS5-14 page a) = = = = 2 b) = = = = 7 c) = = = = 5 2. Teacher to check. 3. a) + b) c) d) + 4. Teacher to check the pictures. a) 17 stickers b) 4 dogs c) 3 km Worksheet NS5-15 page $57 + $12 = $ = km = 162 m = m = km = Answers will vary depending on current year teacher to check. 8. Answers will vary teacher to check. The difference is always 198 because, in a number with this property, the digit in the hundreds place is always 2 greater than the digit in the ones place = David: = 11 Claude: = 36 David and Claude: = 47 Worksheet NS5-16 page a) tens b) millions c) hundred s d) hundreds e) ones 2. a) 5; 647; 110 b) 7; 823; a) two million three hundred twenty-five eight hundred fifty-three b) nine million three hundred seven two hundred eleven 4. b) a) b) a) b) c) Worksheet NS5-17 page a) = b) = c) Erie, Great Slave, Great Bear, Michigan, Superior. d) = Order of numbers may vary but additions are: 8 + 1, 7 + 2, 6 + 3, a) b) or or or c) Exact answers will vary but possible combinations include: 7+ 5 with 4, 6, or 8 as the ones digit and with 5, 6 or 7 as the ones digit. d) Exact answers will vary but the s digit will be 8 and the hundreds digit will be Answers will vary teacher to check Worksheet NS5-18 page a) 2; 4; 2 4 = 8 b) 4; 5; 4 5 = 20 c) 4 rows 4 dots in each row 4 4 = b) 4 2 c) 5 4 d) a) 6 5 = 30 b) 3 7 = a) Same b) Yes teacher to check 5. Teacher to check. Worksheet NS5-19 page a) 0 4 8; = 8 OR ; = 8 4

5 page 5 b) ; = 12 OR ; = a) 8, 12, 16, 20 b) 12, 18, 24, 30 c) 14, 21, 28, a) 15 b) 10 c) 12 d) 18 e) 7 f) 21 g) 9 h) 6 i) 14 j) 25 k) 4 l) 7 m) 16 n) 24 o) 6 4. a) 4 6 = 24 b) 5 4 = 20 Worksheet NS5-20 page b) 5 6; 4 6, 6; 5 6 = c) 3 7; 2 7, 7; 3 7 = d) 5 5; 4 5, 5; 5 5 = a) 2, 2 b) 7, 7 c) 3, 3 d) 6, 6 e) 6, 4, 4 f) 8, 6, 6 g) h) a) 7 4 = = = 28 b) 7 7 = = = 49 c) 9 6 = = = 54 d) 7 9 = = = 63 Worksheet NS5-21 page a) 3, 12, 120 b) Teacher to check. 2, 4, b) 5, 20, 200 c) 4, 12, 120 d) 3, 18, a) 6, 60, 600 b) 5, 50, 500 c) 20, 200, d) 8, a) 150 b) 120 c) 160 d) 150 e) f) g) 240 h) i) j) 420 k) 320 l) Teacher to check s = 8 s = Worksheet NS4-22 page b) 4 10 c) 5 20 d) Answers are top to bottom, left to right: b) 4 13, 4 10, 4 3 c) 2 25, 2 20, 2 5 d) 3 14, 3 10, b) 4 12 = c) 4 25 = d) 3 13 = Worksheet NS5-23 page b) 4 10; 4 4; b) = = 129 c) = = 88 d) = = 639 e) = = 886 f) = = a) 24 b) 84 c) 36 d) 44 e) 84 f) 123 g) 64 h) 69 i) 336 j) 466 k) 696 l) 888 m) 396 n) 884 o) 848 p) a) Atilla planted 996 trees altogether. b) 960 Worksheet NS5-24 page a) 204 b) 126 c) 284 d) 126 e) 273 f) 162 g) 216 h) 188 i) 168 j) 184 k) 405 l) 146 m) 66 n) 219 o) 148 p) 249 q) 128 r) 128 s) 369 t) 455 u) 189 v) 729 w) 355 x) 288 y) 648 z) 288 aa) 279 bb) 639 cc) 306 dd) 488 ee) 368 ff) 65 gg) 159 hh) 567 ii) a) 124 b) 128 c) 155 5

6 page 6 d) 248 c) 1; a) 1; d) e) 246 d) 1; 568 b) 1; e) 456 f) 147 Worksheet NS5-25 page a) 2; 0 b) 1; 6 c) 2; 5 d) 3; 6 e) 3; 5 2. a) 9 b) 7 c) 7 d) 9 e) 7 f) 9 g) 9 h) 4 i) 8 j) 9 3. a) 1; 70 b) 3; 156 c) 2; 180 d) 1; 165 e) 1; 102 f) 1; 160 g) 4; 282 h) 1; 460 i) 2; 231 Worksheet NS5-26 page a) 400, 10, 2; 1 200, 30, 6; b) 300, 20, 3; 600, 40, 6; a) 68 b) 936 c) 848 d) 969 e) a) 1; 456 b) 1; 678 c) 1; 896 d) 1; 648 e) 2; a) 1; 756 b) 3; 805 e) 2; 1; a) 568 b) c) d) e) f) a) 246 b) 639 c) 1288 Worksheet NS5-27 page b) 4 10 c) b) c) a) = b) = 390 c) = 880 d) = a) b) 800 c) d) e) 820 f) g) h) i) j) k) l) b) = c) = d) = e) = f) = 800 f) = 800 Worksheet NS5-28 page b) 2; 00 c) 1; 50 d) 0; 80 e) 2; 50 c) 2; d) 1; e) 1; 780 f) 840 g) 720 h) i) j) b) = = 840 c) = = 690 c) = = 690 Worksheet NS5-29 page a) 1; 115 b) 1; 72 c) 1; 52 d) 0; 86 e) 2; 70 f) 1; 50 g) 1; 72 h) 2; 120 i) 2; 144 j) 1; b) 1; 720 c) 2; 1400 d) 1; 2150 e) 3; a) 1; 3; 210; 700 b) 1; 3; 175; 750 c) 1; 92; 690 d) 1; 2; 75; 450 e) 3; 1; 112; f) 1; 1; 90; g) 1; 1; 132; h) 2; 3; 90; 600 i) 1; 0; 46; 920 j) 2; 1; 195; b) c) a) 1; 1; 75; 750; 825 b) 1; 0; 86; 2150; 2236 c) 1; 2; 441; 1 260; d) 1; 4; 405; 900; e) 2; 3; 112; 840; a) 864 b) c) d) e) f) Worksheet NS5-30 page , 88, 24, 62, 86, 108, 166, 184, , 90, 32, 56, 36, 34, 70, 110, a) 68 b) Yes teacher to check the explanation. 5. a) Yes. b) 270 c) 420 d) e) f) g) h) i) a) 210 b) 320 c) 430 Worksheet NS5-31 page b) 2, 4; = 3 6 c) 3, 4; = 3 7 d) 2, 2; = 3 4 e) 5, 4; = 3 9 f) 2, 6; = 3 8 6

7 page 7 g) 4, 3; = g) books, 4, 3 6. $4 h) 3, 2; = b) c) Teacher to check the grouping, which is based on these combinations: 1 24 or 2 12 or 3 8 or a) Sometimes b) Always c) Sometimes d) Always e) Always f) Never 5. The smallest 2-digit number is 10. Thus the product of = 100. Everything that is greater than 10 will produce a greater product. 6. a) = 1284 b) = 234 Worksheet NS5-32 page a) 333 b) 444 c) 555 d) 666 e) 777 f) Answers will vary depending on how students approximate teacher to check. Sample answer: = km = km = km 9. $364, $ a) True b) True c) True d) True Worksheet NS5-33 page a) caps, 2, 5 b) birds, 4, 3 2. Teacher to check. 3. b) cookies, 8, 4 c) flowers, 3, 6 d) oranges, 9, 5 e) apples, 10, 8 f) passengers, 6, 4 g) cows, 5, 7 h) puppies, 7, 6 4. Teacher to check. Worksheet NS5-34 page a) 3 b) 4 2. a) 5 per set b) 3 per set 3. 2 per set 4. a) 2 b) 4 c) 3 5. a) 2 sets b) 4 sets 6. a) stickers, 5, 6 b) children, 6, 4 c) apples, 7, 2 d) comic books, 3, 8 e) children, 7, 5 f) people, 2, 12 e) books, 4, 3 f) people, 2, 12 h) flowers, 2, 5 i) hamsters, 4, 2 7. a) 2 b) 3 c) 3 d) 2 e) 4 f) 2 g) 2 h) 3 i) 8 j) 5 Worksheet NS5-35 page Teacher to check representation/picture. b) = 8 c) = a) 24 6 = 4 b) 24 4 = 6 c) 21 7 = 3 d) 15 3 = 5 e) 16 4 = 4 f) 24 8 = 3 3. a) 0 4 8; 2 b) ; 8 4. a) 18 2 = 9 b) 9 3 = 3 5. a) 3 b) 2 c) 4 d) 3 e) 9 f) 5 g) 9 h) 7 i) 9 j) 8 k) 4 l) 5 m) 4 n) 6 o) Worksheet NS5-36 page b) 6 4 = 24; 4 6 = 24; 24 4 = 6; 24 6 = 4 c) 3 4 = 12; 4 3 = 12; 12 3 = 4; 12 4= 3; 12, 4, 3 d) 2 4 = 8; 4 2 = 8; 8 2 = 4; 8 4= 2; 8, 4, 2 2. b) 3, 3 c) 8, 8 d) 3, 3 e) 5, 5 3. Teacher to check. Worksheet NS5-37 page a) 16, 4, 4 b) 15, 3, 5 c) 6, 4, 24 d) 3, 3, 9 e) 12, 4, 3 f) 12, 6, 2 2. Teacher to check. 3. Teacher to check picture. a) 21 3 = 7; 21 7 = 3; 7 3 = 21 b) 14 7 = 2; 14 2 = 7; 2 7 = a) 6 3 = 18 b) 20 4 = 5 c) 15 5 = 3 d) 10 2 = 5 e) 4 6 = 24 f) 21 7 = 3 5. a) 15 5 = 3; 3 b) 6 4 = 24; 24 c) 25 5 = 5; 5 7

8 page 8 d) 9 4 = 36; 36 e) 18 9 = 2; 2 f) 18 3 = 6; 6 g) 16 3 = 48; 48 h) 24 8 = 3; 3 i) 20 5 = 4; 4 6. b) 5 9 = 45 marbles c) 35 7 = 5 flowers d) 32 4 = 8 people e) 24 6 = 4 flowers f) 36 6 = 6 candles 7. a) 2 4 = 8; 8 2 = 4; 8 4= 2 b) 3 6 = 18; 18 3 = 6; 18 6 = 3 c) 8 7 = 56; 56 7 = 8; 56 8 = 7 d) 4 9 = 36; 36 4 = 9; 36 9 = 4 Worksheet NS5-38 page No; since 7 2 = 3 R1 teacher to check any diagrams provided. 2. a) 2, 2 b) 3, 1 3. a) 14 4 = 3 R2 b) 18 6 = 3 c) 17 4 = 4 R1 d) 22 3 = 7 R1 4. Each child will receive 4 sea shells, and 2 will be left over groups of 4 pens, R1 OR 4 groups of 7 pen, R1 6. There are two answers: 8 or 12 stickers Worksheet NS5-39 page a) 4 R ; ; 1 b) 3 R 2 c) 6 R 1 d) 5 R 2 e) 2 R 3 f) 1 R 2 g) 4 R 1 h) 5 R 2 i) 7 R 2 j) 3 R 2 k) 3 R 1 l) 3 R 1 m) 4 R 2 n) 6 R 1 o) 3 R 5 p) 2 R 1 q) 5 R 2 r) 9 R 1 s) 5 R 8 t) 6 R 4 u) 5 R 3 Worksheet NS5-40 page a) 3, 7, 6 b) 4, 9, 5 c) 4, 9, 2 d) 5, 8, 6 2. a) 1 b) 1 c) 1 d) 2 e) 2 f) 1 g) 1 h) 2 i) 1 j) 1 3. b) 2, 4, 2 c) 1, 5, 1 d) 4, 2, 4 4. a) 2, 9, 4, 8 b) 4, 9, 2, 8 5. b) 3, 6 c) 4, 8 d) 1, 5 e) 1, 5 f) 1, 5 g) 2, 8 h) 2, 6 i) 1, 6 j) 1, 7 k) 1, 9 l) 1, 8 m) 1, 7 n) 3, 9 o) 2, 6 p) 2, 8 q) 1, 9 r) 1, 7 s) 2, 6 t) 4, 8 6. a) 1, 8, 1 b) 3, 6, 1 c) 1, 4, 2 d) 2, 6, 2 e) 1, 3, 1 f) 1, 5, 3 g) 1, 6, 3 h) 2, 6, 2 i) 1, 5, 2 j) 2, 8, 0 7. a) 1, 5, 25 b) 1, 3, 27 c) 2, 8, 13 d) 3, 6, 13 e) 1, 5, 46 f) 1, 9, 3 g) 1, 4, 36 h) 1, 8, 18 i) 1, 7, 21 j) 1, 8, a) 24, 8, 16 b) 17, 5, 35 c) 37, 6, 15 d) 17, 3, 21 e) 14, 5, 22 f) 12, 7, 15 g) 47, 8, 15 h) 12, 8, 16 i) 30, 9, 2 j) 46, 8, a) 14, 5, 24, 20, 4 b) 25, 6, 17, 15, 2 c) 33, 6, 7, 6, 1 d) 17, 4, 30, 28, 2 e) 22, 8, 10, 8, 2 f) 27, 6, 21, 21, 0 g) 21, 8, 4, 4, 0 h) 19, 5, 46, 45, 1 i) 14, 6, 29, 24, 5 j) 10, 9, 7, 0, 7 k) 23, 8, 13, 12, 1 l) 12, 8, 17, 16, 1 m) 14, 6, 26, 24, 2 n) 13, 7, 25, 21, 4 o) 40, 8, 0, are left over (since 98 8 = 12 R2). 11. There are 13 weeks in 93 days (since 93 7 = 13 R2) days m 14. Tyree uses more boxes. Worksheet NS5-41 page Teacher to check diagrams final answer will be: = 167 R1 2. a) 266 b) 129 R3 c) 181 R2 d) 247 R1 e) 150 f) 212 R1 g) 117 R6 h) 115 R3 i) 170 R2 j) 137 R3 k) 101 R6 l) b) 73 R3 c) 73 R2 d) 64 e) 84 8

9 page 9 f) 91 R ; = 2400 c) 900 n) g) 92 h) 35 R7 i) 56 R2 4. a) m b) R3 c) R2 d) 446 R1 e) 316 R km books Worksheet NS5-42 page children 2. a) 150, cars b) 105, 150, 510 c) 150, 510 d) 105, 150, 501, days 7. 8 plums pages Worksheet NS5-43 page students 2. 18, pencils in a set; 4 sets in total; cost is 17 per set and 68 in total. 4. $ m 6. Error in question please ignore a) 25 years old b) 49 years old 9. a) m b) 200 m c) 3 laps = 4 So there are 4 groups of 3 in 12 CDs: 4 $23 = $ Total # of letters = = Half of all the letters = = R1 So none of the letter carriers delivered more than half the letters. Worksheet NS5-44 page 101 Answers may vary teacher to check. 1. a) 0 b) 10 c) 0 d) a) 1, 2, 3, 4 b) 6, 7, 8, 9 c) The number 5 is 5 units from both 0 and a) b) c) a) 30 b) 10 c) 40 d) 70 e) 250 f) a) 100 b) is in between 0 and a) 100 b) 0 c) 0 d) Teacher to check. a) 600 b) 700 c) 800 d) a) 200 b) 600 d) a) 0 b) a) 0 b) c) , a) b) c) d) Teacher to check. Worksheet NS5-45 page a) 20 b) 30 c) 70 d) 60 e) 90 f) 80 g) 20 h) 50 i) 30 j) 40 k) b) 180 c) 360 d) 340 e) 550 f) 670 g) 660 h) 850 i) b) 500 c) 500 d) 300 e) 200 f) 300 g) 200 h) 900 i) 800 j) k) l) m) o) b) c) d) e) f) Worksheet NS5-46 page a) 3 round down b) 5 round up c) 5 round down d) 2 round up e) 5 round up f) 2 round down 2. a) rd b) ru c) rd d) ru e) rd f) rd 3. a) 2200 b) 3900 c) d) e) f) g) h) Worksheet NS5-47 page b) = 80 c) = 40 d) = 30 e) = 90 f) = 40 g) = 50 h) = 90 i) = 130 j) = 30 k) = 80 l) = 90 m) = b) = 900 c) = 400 d) = 200 9

10 page 10 e) = 900 f) = 300 g) = 800 h) = 1000 i) = 1000 j) = 400 k) = 700 l) = b) = c) = d) = a) = b) = c) = Worksheet NS5-48 page Exact date 5. Hundredth 6. Teacher to check, answers will vary. 7. Teacher to check. Worksheet NS5-49 page a) 120 b) 120 c) 1200 d) a) 1 zero b) 2 zeroes c) 3 zeroes 3. a) b) c) a) 170 b) 500 c) d) 6900 e) f) g) h) i) b) = 200 c) = 800 d) = 600 e) = f) = a) 3 b) 4 c) 5 Worksheet NS5-50 page b) 800, 20 - high 400, 10 - high 1 200, 30 - high c) 800, 20 - high 300, 40 - low 1 100, 20 - low d) 700, 20 - low 200, 10 - high 900, 10 - low 2. a) Too low: 955 b) Too high: a) 500 b) c) a) Nearest hundred b) 1 up, 1 down c) Front end d) 1 up, 1 down e) Nearest hundred 5. Teacher to check. Worksheet NS5-51 page Teacher to check explanations. 2. a) 50 b) 50 c) d) 30 e) f) g) 100 h) 10 i) a) 58R2 b) 40 c) 150 d) 70 e) 60 f) 30 g) 70 h) 90 i) Teacher to check 5. a) b) 85 c) a) = b) = Teacher to check. Worksheet NS5-52 page a) 5, 10, 15, 20, 25 26, 27, 28 b) 5, 10, 15, 20 21, 22, a) 10, 20, 30 35, 40, 45, 50, 55 b) 10, 20, 30 35, 40, 45, 50 c) 25, 50, 75 80, 85 d) 25, 50, 75 85, b) , 70 71, 72, 73 c) 25, 50 60, 70 75, 80 d) 25, 50, 75 85, 95 96, 97 25, 50 60, 70, 80 85, 90 91, 92, 93, b) 25, 50, 60, 70, 80, 81 c) 25, 50, 75, 100, 125, 135, 145, 150, 155, 160,161, 162, b) 25, 50 55, 60 61, 62, 63 c) 25, 50 60, 70 71, 72 d) 25, 50, 75 85, , , 50 60, 70, 80 85, 90 91, 92, 93, a) 37 b) 95 c) 150 d) 114 e) 215 f) 90 g) a) 48 b) 97 c) 86 d) 76 e) 119 Worksheet NS5-53 page a) b) c) d) a) b) c) d)

11 page 11 e) f) g) h) i) + $2 + $1 j) + $2 + $1 k) + $1 + $1 l) + $2 + $1 m) n) a) b) c) + $2 + $2 d) + $ a) Yes, b) Yes, Answers will vary. Worksheet NS5-54 page a) 25 b) 25, 25 c) 25, 25, 25 d) 25, 25, 25 e) 25, 25 f) 25, 25 g) 25 h) 25 i) 25, 25, 25 j) 25, 25, b) 50 ; = 7 ; coins: 5, 1, 1 c) 75 ; = 10 ; coins: 10 d) 75 ; = 20 ; coins: 10, a) b) $1 c) $1 d) 25 + $1 e) $2 + $ f) $2 + $ a) $ b) c) $2 + $2 + $2 + $2 d) $2 + $2 + $2 + $2 + $ e) $2 + $2 + $2 + $2 + $ Worksheet NS5-55 page b) 0, 6, 2, $0.62 c) 4, 6, 5, $4.65 d) 0, 0, 2, $ b) 20, $0.20 c) 60, $0.60 d) 4, $0.04 e) 13, $0.13 f) 25, $0.25 g) 25, $0.25 h) 75, $0.75 i) 80, $0.80 j) 1 200, $12.00 k) 400, $4.00 l) 700, $ a) $5.00, 55, $5.55 b) $15.00, 36, $15.36 c) $20.00, 51, $ b) 110, $ a) $3.25 b) $0.20 c) $0.06 d) $2.83 e) $ a) 299 b) 343 c) 141 d) 8 7. a) $1.96 b) 103 c) a) Seven dollars and seventy cents b) Nine dollars and eighty-three cents c) Fifteen dollars and eighty cents 9. a) 1, 1, 2, 1, 1, 1, 1, 1, 2; $43.42 b) 2, 1, 1, 2, 1, 1, 1, 1, 0; $60.40 c) 1, 2, 1, 1, 1, 2, 0, 1, 2; $ $2.62; 200 = $2.00 and $0.62 > toonie, 1 loonie, 2 quarters loonies, 1 quarter 13. a) Three dollars and fifty-seven cents b) Twelve dollars and twenty-three cents c) Six hundred four dollars and eighty cents d) Three hundred twenty-seven dollars and twenty-five cents e) Twenty-six dollars and ninety-three cents f) Seven hundred sixty-six dollars and three cents Worksheet NS5-56 page b) 2, 50, 0, 50, 0, 50, 2 c) 3, 75, 2, 95, 0, 95, 2 d) 0, 0, 2, 20, 0, 20, 3 e) 1, 25, 1, 35, 1, 40, 2 f) 3, 75, 1, 85, 1, 90, 4 2. a) $40 b) $20 c) $20 d) $40 e) $20 3. Answer may vary teacher to check. b) 0, 1, 1, 0, 0, 0 c) 1, 0, 0, 0, 2, 0 d) 1, 1, 1, 1, 0, 0 e) 1, 0, 1, 0, 2, 0 4. a) b) c) d) a) $50 + $5 b) $50 + $10 + $5 + $2 c) $50 + $10 + $2 + $2 d) $100 + $20 + $2 + $1 e) $50 + $10 + $ f) $20 + $20 + $ g) $50 + $5 + $ h) $50 + $20 + $5 + $2 + $ i) $50 + $20 + $2 + $ j) $100 + $50 + $5 + $ k) $50 + $20 + $20 + $ l) $50 + $20 + $10 + $

12 page 12 Worksheet NS5-57 page a) 6 b) 9 c) 6 d) 7 e) 4 f) 5 g) 2 h) 1 i) 2 2. a) 10 b) 30 c) 50 d) 60 e) 90 f) 70 g) 80 h) 40 i) a) 20 b) 30 c) 80 d) 40 e) 50 f) 70 g) 90 h) 60 i) b) 60 c) 50 d) 30 e) 60 f) a) 4, 60, 40, 44 b) 7, 90, 10, 17 c) 6, 60, 40, 46 d) 5, 30, 70, 75 e) 3, 50, 50, 53 f) 9, 40, 60, a) 26 b) 33 c) 64 d) 47 e) 28 f) 65 g) 3 h) 41 i) 11 j) 8 7. a) 13 b) = a) $8.00 b) $6.00 c) $6.00 d) $3.00 e) $4.00 f) $ a) 3, 30, 20, $23.00 b) 2, 40, 60, $62.00 c) 7, 60, 40, $47.00 d) 6, 20, 30, $ a) $16 b) $75 c) $54 d) $12 e) $ $2, $70, $ a) 15 + $7 + $60 = $67.15 b) 73 + $3 + $10 = $13.73 c) 81 + $7 + $40 = $47.81 d) 57 + $3 + $30 = $33.57 Worksheet NS5-58 page a) $8.68 b) $58.38 c) $ a) $40.35 b) $72.57 c) $93.95 d) $60.60 e) $82.65 f) $ $ $ $ Yes 7. a) $64.55 b) $52.75 c) $73.25 d) $ a) $55.19 b) Pants & soccer ball c) Yes d) $ a) $9.20 b) 7 c) 8 d) No e) 3 oranges Worksheet NS-59 page a) $1.32 b) $4.42 c) $4.21 d) $2.01 e) $ a) $ $ $1.31 b) $2.76 c) $1.28 d) $22.55 e) $30.67 f) $ No, short by $2.88 Worksheet NS-60 page a) 1, 1, 2, 2, 1, 1, 1, 1, 1; Estimates may vary; Total = $45.41 b) 2, 2, 1, 3, 1, 2, 1, 1, 1; Estimates may vary; Total = $72.66 c) 2, 3, 1, 1, 1, 2, 1, 1, 3; Estimates may vary; Total = $ b) 90 c) 50 d) 20 e) 50 f) 80 g) 30 h) 10 i) b), e) 4. b) $13.00 c) $26.00 d) $7.00 e) $45.00 f) $12.00 g) $53.00 h) $65.00 i) $12.00 j) $ b) $8.00, $3.00, $5.00 c) $6.00, $3.00, $9.00 d) $10.00, $3.00, $7.00 e) $27.00, $16.00, $11.00 f) $58.00, $20.00, $78.00 g) $75.00, $17.00, $ $ $ $ $ a) $31, $30.96 b) $62, $ The difference in the amount is less than $1. 12

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