Friday, 30 September 2011

Matematik Addition And Subtraction

Addition and Subtraction Idea Bank

counting up and counting back
For the addition facts, I tell the kids to "think the biggest number first and add up." Think "9" and count on 7 more for 7 + 9. For the subtraction facts, if there is a big number on the bottom, ex. 11 - 8, think 8 and count up to 11. Little number on the bottom, ex. 11 - 3, think 11 and count back 3. It works for us.