1. Copy and complete each number pattern. a b c. 51 kg 51,2kg 51,8kg d

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1 125 Unit 2. Whole Numbers: Addition and Subtraction (6 digit numbers). Activity 1. Whole Numbers. 1. Copy and complete each number pattern. a b c. 51 kg 51,2kg 51,8kg d e Write these words as numbers. a. Five hundred and twenty one thousand one hundred and eight. b. One hundred and nineteen thousand six hundred and thirty two. c. Six hundred and forty two thousand one hundred and seventy. d. Eight hundred and seventy three thousand and thirteen. 3. Copy and complete the table. Number. Expanded Notation. The no. in words. Example: Thirty one thousand five hundred and four. a b c d e f g h i j What is the place value of the 9 in each of these numbers? a b c d e f g h Arrange these numbers from biggest to smallest. a b c d e

2 Round off to the nearest 5, 10, 100 and Copy and complete the table Example: a b c d e Use the numbers in the block. Use each digit only once. 8; 7; 0; 3; 5; 6; 1; 2; 4 a. Make the smallest 9 digit number. b. Make the biggest 9 digit number. You can use 1 digit twice. 8. Prime numbers. a. Write down the prime numbers between 10 and 30. b. Write the prime numbers between 50 and 70. Activity 2. Working with big numbers. Millions Hundred Ten Thousands Hundreds Tens Units Thousands Thousands M HTH TTH TH H T U Copy and complete the number sentences. 1. a. 905+?=1 000 b. 775+?=1 000 c. 145+?=1 000 d. 575+?=1 000 e. 622+?=1 000 f. 354+?= a ?=850 b ?=444 c ?=175 d ?=903 e ?=629 f ?= a ?= b ?= c ?= d ?= e ?= f ?=10 000

3 a ?=1 690 b ?=900 c ?=4 345 d ?=6 825 e ?=2 815 f ?= A soccer stadium holds people. There are spectators at the match. How many empty seats are there? Activity 3. Add and Subtract. Copy and complete the tables. 1. Number Add 10 Add 100 Add Add Add a b c d e Number Subtract 10 Subtract 100 a b c d e Word Problems. Subtract Subtract a. There were pine trees in a forest. A fire destroys trees. How many trees are left? b. Three new plantations are planted with , and trees. How many new pine trees are planted altogether? Subtract Activity 4. Round off, estimate and calculate (5 digit numbers). The easiest way to estimate an answer is to round off each number to the nearest 10, 100, 1 000, or

4 128 Addition. Use the examples below to complete each addition calculation. Number =? nearest = nearest = nearest = Work out a b c d e f Subtraction. Number nearest = nearest = nearest = Work out a b c d e f Unit 3. Addition and Subtraction. Activity 1. Fun with big numbers. 1. Write each number in expanded notation and in words. a b c d e Five hundred and ninety eight thousand three hundred and four. f g h

5 129 i j Write the number sentences. E.g: = How fast can you do these? 4. a. Add and a. Decrease by b. Subtract from b. Increase by c plus c. Subtract from d. The sum of and d. The sum of and e. Take from e. Round off to nearest Activity 2. Addition of 6 digit numbers. 6 digit numbers are very large numbers and it is important to write them correctly. M HTH TTH TH H T U Always leave a gap between millions and hundred thousands. Always leave a gap between thousands and hundreds. 1. Write the numbers like the example given below. Remember to leave gaps in the correct places. Example: Four million three hundred and seven thousand and forty two = Drawing columns with the headings M, HTH, TTH, TH, H, T and U might help you. a. two million four hundred and eighty seven.

6 130 b. five million two hundred thousand and fifty. c. one million fifty five thousand two hundred and forty. d. eight million three hundred and twenty one thousand and six. e. six million twenty one thousand and nine. 2. a ? = b ? = c ? = d ? = e ? = f ? = Activity 3. Adding 6 digit numbers. To which hundred thousand is each number closest? a b c a is closer to than b is halfway between and c is closer to than Round off each number to the nearest a b c d Look at the example below and then complete each addition calculation. Addition. Number Nearest Work out = a b c d e f g h i Activity 4.

7 131 Subtracting 6 digit numbers. Look at the example below and complete each subtraction calculation. Subtraction. Number. Round off to nearest Work out. Check with inverse operation = a b c d e f g h i Activity 5. Addition and subtraction word problems. 1. The Sibisi family bought a house for R They paid a deposit of R How much do they still owe? 2. What is the difference between R and the sum of R and R ? 3. The shoe factory produced pairs of black school shoes and pairs of brown school shoes. How many pairs of shoes did they produce altogether? 4. Write an interesting word problem of your own for: and Solve the problem.

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