ADDITION USING PARTITIONING

1
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

2
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

3
Answers to Task 1

• 1. 64 82 146
• 60 80 140
• 4 2 6
• 140 6 146
• 2. 37 59 96
• 30 50 80
• 7 9 16
• 80 16 96
• 3. 41 74 115
• 40 70 110
• 1 4 5
• 110 5 115

4
Answers to Task 1 (continued)

• 4. 89 62 151
• 80 60 140
• 9 2 11
• 140 11 151
• 5. 37 96 133
• 30 90 120
• 7 6 13
• 120 13 133

5
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!