ADDITION USING PARTITIONING

The following questions are multiple choice.  When working out these

questions mentally you must use the following method.

e.g.  48 + 69 = ? 40 + 60 = 100

8 + 9 = 17 100 + 17 = 117

Therefore 48 + 69 = 117

By Auveen Twomey

Task 1Use the method shown previously to answer the following multiple choice

questions. Can you explain to a partner how you partitioned each number?

1. 64 + 82 = A. 145 B. 146 C. 156

2. 37 + 59 = A. 96 B. 82 C. 94

3. 41 + 74 = A. 85 B. 115 C. 105

4. 89 + 62 = A. 146 B. 151 C. 153

5. 37 + 96 = A. 131 B. 132 C. 133

Answers to Task 1

1. 64 + 82 = 14660 + 80 = 140

4 + 2 = 6140 + 6 = 146

2. 37 + 59 = 9630 + 50 = 80

7 + 9 = 1680 + 16 = 96

3. 41 + 74 = 11540 + 70 = 110

1 + 4 = 5110 + 5 = 115

Answers to Task 1 (continued)

4. 89 + 62 = 15180 + 60 = 140

9 + 2 = 11140 + 11 = 151

5. 37 + 96 = 13330 + 90 = 120

7 + 6 = 13120 + 13 = 133

Task 2

Write 4 calculations and work out the answers.Then pass them to your partner (without the answers) to complete.When they have finished mark their work. Remember they must use the PARTITIONING method!