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Add and Subtract Integers with Counters

作者:Marshall Dinkins, John Ulbright
主题:整数

Use the app to visualize each problem and record your answers in the box provided.

  1. 3 + (-4) =
  2. 3 - 4 =
  3. 3 - (-4) =
  4. -4 - (-5) =
  5. -6 + 9 =

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