Math Strategies

We have been working on solving two digit subtraction with regrouping. We have done a ton of these in class. Here is the chart that we use to help us remember the steps.

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  • Step 1: Break apart into 10’s and 1’s.
  • Step 2: Compare 10’s to 10’s and 1’s to 1’s. If the 1’s from the first number is larger than the second number’s 1’s, then go to Step 5. If the 1’s from the first number are smaller than the second number’s, then go to Step 3.
  • Step 3: Break the 10’s apart from the first number and give 10 to the 1’s.
  • Step 4: Compare the 10’s to the 10’s and the 1’s to the 1’s. The first number’s 10’s should be bigger than the second number’s and same with the 1’s.
  • Step 5: Subtract the 10’s. Subtract the 1’s.
  • Step 6: add the 10’s and 1’s together. That is your answer.

 

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