Whole Number Multiplication and Division
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- Drusilla Lee
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1 2 CHAPTER Worksheet 1 Whole Number Multiplication and Division Using a Calculator Use your calculator for these exercises. 1. Circle the button you press to turn on your calculator. Turn On On/Off Enter 2. Enter these digits on your calculator Write the number displayed on your calculator. 3. Circle the button you press to clear the display on your calculator. Clear CE C 4. Enter each number on your calculator. a. 4,782 b. 678,435 c. 3,917,403 d. 7,008,009 How do the numbers displayed on the calculator differ from the printed numbers? Reteach 5A 27
2 5. Which sequence of buttons should you press to fi nd the value of 259 4,783? Check ( ) the box next to the correct answer. Then use your calculator to fi nd the sum. Press this sequence of buttons: C ,783 Use your calculator to add or subtract. 6. 5,728 6, ,824 2, $8,389 $7,402 $ 9. 6,083 kg 4,709 kg kg Check the box next to the correct answer. 10. How do you fi nd the difference between 4,269 and 1,597? 4,269 1,597 4,269 1, Chapter 2 Lesson 2.1
3 Check the box next to the correct answer. 11. How do you fi nd the sum of 6,677 and 23,567? 6,677 23,567 23,567 6,677 Use your calculator to answer these questions. 12. What is the sum of 7,625 12,496? 13. What is the difference between 5,697 and 4,283? Fill in the missing buttons. Then press the sequence of buttons to find the product or quotient ,878 C C ,652 4 C 4 Reteach 5A 29
4 Use your calculator to multiply , , Use your calculator to divide , , , Use your calculator to answer these questions. 22. What is the product of 748 and 254? 23. What is the quotient of 7,470 divided by 6? Use your calculator to solve these problems. 24. Grandpa donates a total of $78,645 equally to 5 charities. How much money does each charity receive? 25. The area of the fl oor in a rectangular kitchen is 209,196 square centimeters. The area of each square tile is 36 square centimeters. How many square tiles are needed to tile the kitchen fl oor? 30 Chapter 2 Lesson 2.1
5 Worksheet 2 Complete. Multiplying by Tens, Hundreds, or Thousands ten tens Multiply , Complete tens ( 25 5 ) , tens ( ) Reteach 5A 31
6 Complete tens ( ) tens ( ) , ,456 tens ( ) , ,135 tens ( ) Chapter 2 Lesson 2.2
7 Complete hundred hundreds Multiply , Complete hundreds ( 16 2 ) , hundreds ( ) Reteach 5A 33
8 Complete hundreds ( ) hundreds ( ) , ,325 hundreds ( ) , ,046 hundreds ( ) Chapter 2 Lesson 2.2
9 Complete ,000 thousand 24. 6,000 thousands Multiply. 5 1,000 5, , , , ,247 1,000 Complete. 25 3, thousands ( 25 3 ) 1, ,000 75, , thousands ( ) 1,000 1,000 Reteach 5A 35
10 Complete , thousands ( ) 1,000 1, , thousands ( ) 1,000 1, ,324 7,000 1,324 thousands ( ) 1,000 1, ,305 4,000 2,305 thousands ( ) 1,000 1, Chapter 2 Lesson 2.2
11 Round to the nearest ten Round to the nearest hundred Round the 2-digit number to the nearest ten and the 3-digit number to the nearest hundred. Then multiply to estimate the product is about ,000 Round 672 to the nearest hundred and 81 to the nearest ten. 672 rounds to rounds to is about is about is about is about. Reteach 5A 37
12 Round to the nearest thousand , ,391 Round the 2-digit number to the nearest ten and the 4-digit number to the nearest thousand. Then multiply to estimate the product. 1, is about 1, ,000 Round 1,289 to the nearest thousand and 48 to the nearest ten. 1,289 rounds to 1, rounds to , is about , is about ,485 is about ,243 is about. 38 Chapter 2 Lesson 2.2
13 Worksheet 3 Complete. Multiplying by 2-Digit Numbers tens tens tens tens Complete tens tens tens tens tens tens 10 Reteach 5A 39
14 Multiply by tens Do this fi rst: Do this fi rst: Do this fi rst: Chapter 2 Lesson 2.3
15 Multiply. Estimate to check your answer add Estimate: 23 rounds to rounds to The estimate shows the answer 667 is reasonable add Estimate: 48 rounds to. 62 rounds to. The estimate shows the answer is reasonable. Reteach 5A 41
16 Multiply. Estimate to check your answer Estimate: is about. The estimate shows the answer is reasonable Estimate: is about. The estimate shows the answer is reasonable Chapter 2 Lesson 2.3
17 Multiply. Estimate to check your answer , , , add Estimate: 138 rounds to rounds to ,000 The estimate shows the answer 4,416 is reasonable add Estimate: 127 rounds to. 53 rounds to. The estimate shows the answer is reasonable. Reteach 5A 43
18 Multiply. Estimate to check your answer Estimate: is about. The estimate shows the answer is reasonable Estimate: is about. The estimate shows the answer is reasonable Chapter 2 Lesson 2.3
19 Multiply. Estimate to check your answer. 1, ,824 1, , , , , , add Estimate: 1,492 rounds to 1, rounds to 20. 1, ,000 The estimate shows the answer 32,824 is reasonable , , , , add Estimate: 1,825 rounds to. 48 rounds to. The estimate shows the answer is reasonable. Reteach 5A 45
20 Multiply. Estimate to check your answer , , Estimate: 2, is about. The estimate shows the answer is reasonable , , Estimate: 4, is about. The estimate shows the answer is reasonable , , Chapter 2 Lesson 2.3
21 Worksheet 4 Divide Dividing by Tens, Hundreds, or Thousands 8 Think of multiplication So, Think of multiplication. 10 So, , , Reteach 5A 47
22 Complete ( ) ( 10) 7. 1, ( 10) 8. 2, ( 10) Divide , , , Chapter 2 Lesson 2.4
23 Complete. 1, ( 1, ) , ( 100) 16. 8, ( 100) , ( 100) Divide , , , , , , Reteach 5A 49
24 Complete. 21,000 3,000 ( 21,000 1,000) ,000 4,000 ( 1,000) ,000 7,000 ( 1,000) ,000 6,000 ( 1,000) Divide ,000 7, ,000 8, ,000 6, Chapter 2 Lesson 2.4
25 Estimate is about rounds to is close to 195 and can be divided by 50. divisor quotient dividend is about. 72 rounds to. is close to 138 and can be divided by. Reteach 5A 51
26 Estimate is about. 84 rounds to. is close to 314 and can be divided by , , Chapter 2 Lesson 2.4
27 Worksheet 5 Divide Dividing by 2-Digit Numbers can be divided exactly by 20. So I can also use this method: , , Reteach 5A 53
28 Divide The answer is , , The answer is. 54 Chapter 2 Lesson 2.5
29 Divide R cannot be divided exactly by 30. So I cannot cancel the zeros to fi nd the answer. I have to use long division. remainder R R Reteach 5A 55
30 Divide R Estimate the quotient: 22 rounds to is less than 22. The estimated quotient is just right R Estimate the quotient: 18 rounds to is greater than 18. The estimated quotient is too small. Try Chapter 2 Lesson 2.5
31 Divide R Estimate the quotient: 12 rounds to is greater than 45. The estimated quotient is too big. Try R Reteach 5A 57
32 Divide R R R 58 Chapter 2 Lesson 2.5
33 Divide R 15 Notice that when we divide a 3-digit number by a 2-digit number, if the fi rst two digits of the dividend are less than the divisor, the quotient will be a 1-digit number. divisor quotient dividend R R R Reteach 5A 59
34 Divide R When we divide a 3-digit number by a 2-digit number, if the fi rst two digits of the dividend are greater than the divisor, the quotient will be a 2-digit number. For , 25 is greater than 20. So, the quotient will be a 2-digit number R R R 60 Chapter 2 Lesson 2.5
35 Divide , R 50 1, , R 70 1, , R 22. 3, R Reteach 5A 61
36 Divide , R 15 1, , R 18 2, , R 26. 3, R 62 Chapter 2 Lesson 2.5
37 Worksheet 6 Order of Operations Find the value of each numeric expression A numeric expression contains only numbers and operation signs Work from left to right when there are only addition and subtraction. Step Step Reteach 5A 63
38 Find the value of each numeric expression Chapter 2 Lesson 2.6
39 Find the value of each numeric expression Work from left to right when there are only multiplication and division. Step Step Reteach 5A 65
40 Find the value of each numeric expression Work from left to right. Carry out multiplication and division before addition and subtraction. Step Step Chapter 2 Lesson 2.6
41 Find the value of each numeric expression Find the value of each numeric expression Reteach 5A 67
42 Find the value of each numeric expression. 9 (12 23) Carry out the operation in the parentheses fi rst. Step Step (135 78) ( ) (219 39) (124 77) (3 4) ( ) 68 Chapter 2 Lesson 2.6
43 Find the value of each numeric expression (24 15) (5 5) (37 8) (102 96) (162 59) (5 3) ( ) ( ) Reteach 5A 69
44 Find the value of each numeric expression (35 77) 8 Step 1 Carry out the operation in the parentheses. Step 2 Divide. Step 3 Add (145 5) (248 4) 8 Step 1 Carry out the operation in the parentheses. Step 2 Multiply. Step 3 Subtract (82 75) 326 Find the value of each numeric expression (28 7) 48. (59 23) Chapter 2 Lesson 2.6
45 Worksheet 7 Real-World Problems: Multiplication and Division Fill in the circle next to the correct answer. 1. Samantha had 48 stamps. She gave 15 stamps to Cindy. Samantha then bought another 9 stamps. How many stamps did Samantha have in the end? A B C D Mrs. Lee put 4 fl owers into each of her 5 vases. She had 12 fl owers left. How many fl owers did she have altogether? A B (4 12) 5 C 4 (5 12) D There were 6 rows of tables in a room. In each row, there were 8 tables. Then Julie rearranged the tables so that there were only 4 rows. How many tables were there in each row in the end? A 6 (8 4) B C D Mr. Nathan bought a piano for $6,194. He made an initial payment of $1,250. He made equal, monthly payments for the next 6 months. How much did Mr. Nathan pay each month? A $6,194 $1,250 6 B $6,194 $1,250 6 C ($6,194 $1,250) 6 D ($6,194 $1,250) 6 Reteach 5A 71
46 Solve. 5. When a number is divided by 57, the answer is 72. What is the number? The number is. 6. When a number is multiplied by 46, the answer is 5,520. What is the number? 7. The product of two numbers is 7,098. One of the numbers is 78. Find the other number. 72 Chapter 2 Lesson 2.7
47 Solve. 8. Tran can type 56 words in a minute. How many words can he type in 45 minutes? 9. A business owner paid a total of $7,392 in 48 months for her inventory. She paid the same amount of money each month. How much money did she pay each month? 10. Mrs. Gerber is preparing fruit skewers for a neighborhood block party. She has 275 pieces of fruits. She skewers 4 pieces of fruit on each stick. How many sticks does she need? Reteach 5A 73
48 Solve. 11. Jorgen bought 6 boxes of cranberries and 7 boxes of blueberries. Each box contained 125 berries. How many berries did he buy in all? 12. Anna owed a bank $12,750. She paid the bank $475 every month. How much money did Anna still owe the bank after 22 months? 13. The table shows the pay rates for the staff at a café. Harry works at the café for 8 hours on each weekday from Monday to Friday. He also works for 5 hours each Saturday and Sunday. How much money does Harry make in a week? Weekdays Weekends $15 per hour $25 per hour 74 Chapter 2 Lesson 2.7
49 Worksheet 8 Real-World Problems: Multiplication and Division Draw a model to represent the statements. Emma has 75 paper clips. Daniel has 5 times as many paper clips as Emma. Emma Daniel Kathy s salary is $720 per month. Her father s salary is 3 times as much as Kathy s salary. Reteach 5A 75
50 Solve. Draw models to help you. 2. Taylor has 83 stamps. Alyssa has 3 times as many stamps as Taylor. a. Draw a model to show the number of stamps each child has. b. How many stamps does Alyssa have? c. How many stamps do they have altogether? 3. Container A has 4 times as much water as Container B. Container C has 3 times as much water as Container A. Container B has 87 gallons of water. How much water is in the three containers altogether? 76 Chapter 2 Lesson 2.7
51 Solve. Draw models to help you. 4. Box A contains 53 cubes and has a total mass of 1,760 grams. Box B contains 18 cubes and has a total mass of 1,620 grams. The mass of Box A is the same as the mass of box B. Every cube has the same mass. Find the mass of each cube. 5. Jessica and Lillian had the same amount of money. Jessica gave $1,140 to a charity and Lillian gave $580 to a different charity. In the end, Lillian had 9 times as much money as Jessica. How much money did each girl have at fi rst? Reteach 5A 77
52 Solve. Draw models to help you. 6. A crate contains apples, pears, and oranges. There are 184 apples and pears, and 248 apples and oranges. There are 3 times as many oranges as pears. How many apples are in the crate? 7. Chris is 4 times as old as Peter. Sara is 6 years younger than Chris. The total age of Chris, Peter, and Sara is 66 years. How old is Sara? 78 Chapter 2 Lesson 2.7
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