The Math Meridian
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1 more, 1 less, 10 more, 10 less

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Learn it Adding or taking away 10 changes only the tens digit. Adding or taking away 1 changes the ones digit.

Example: What is 10 more than 46?

  1. 46 has 4 tens and 6 ones.
  2. 10 more makes 5 tens. The ones stay 6.
  3. 10 more than 46 is 56.

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