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ADDITION USING PARTITIONING

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.

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ADDITION USING PARTITIONING

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  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 = 1008 + 9 = 17100 + 17 = 117Therefore 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!

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