November 15, 2012

Subtraction Strategies

Today we looked at the different ways to calculate subtraction problems.  
The boys and girls learned about: 


  • drawing a picture of, for example, 15-9. You draw 15 circles, cross off 9 and there's your answer
  • using a hundreds chart (just remember to count backwards!) 
  • Use a ruler for smaller calculations 
  • Count up from the smallest number to the larger number (15-9, count up from 9 to 15) 
  • Counting backwards 
  • just plain memorizing 'em!  

The boys and girls then went on to practice a few double digit subtraction problems with regrouping. This is where the Head family joins our Math unit. More on them in another post, but they do indeed help make this skill a little easier to understand for many boys and girls.  

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