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Mental Math Strategies

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  • What strategy would you use to solve 6+6?
    Doubles
  • What strategy would you use to solve 6-3?
    Counting back
  • 3+3
    6
  • 7-3
    4
  • 8+8
    16
  • 5+3
    8
  • 9+9=? Strategy?
    18 Doubles
  • 6+4
    10
  • What mental math strategy would you use to solve this question?
    Friendly 10s
  • 3+7
    10
  • 6-2=? Strategy?
    4 Counting back
  • What strategy would you use to solve 9+1?
    Counting on or Friendly 10
  • You use this strategy when you are adding or subtracting 1, 2 or 3
    Counting on and counting back
  • 2+8
    10
  • 4-3
    1
  • 9+3
    12
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