alternative strategies

Card Set Information

Author:
Anonymous
ID:
29344
Filename:
alternative strategies
Updated:
2010-08-08 22:11:41
Tags:
strategy
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Description:
cards with alternative addition and subtraction strategies
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  1. 43 + 56

    40 + 50 = 90
    3 + 6 = 9
    90 + 9 = 99
    • split strategy
  2. 35 + 12

    12 = 5 + 7
    35 + 5 = 40
    40 + 7 = 47
    jump strategy
  3. 500-123 = 499-122

    499
    -122
    377
    take a penny
  4. 324 + 62

    320 + 60 = 380
    4 + 2 = 6
    380 + 6 = 386
    split strategy
  5. 498 + 163

    498 + 2 = 500
    163 -2 = 161
    500 + 161 = 661
    jump strategy
  6. $5.00 - $1.48 = $4.99 - $1.47

    $4.99
    -$1.47
    $3.52
    take a penny

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