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Thursday, 31 August 2017

Solving subtraction and addition problems using compensating

  1. 97 + 69
  2. 398 + 189
  3. 386 + 498
  4. 77 + 98
  5. 465 - 197


















Awsers: 1. 166, 2. 587, 3. 884, 4. 175, 5. 268
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