There are a variety of strategies that can be used to figure out or remember the basic facts. The Property of Zero states that if zero is added to any number, the sum equals that number. Zero subtracted from any number is the original number. Secondly, any number subtracted from itself equals zero. Once children readily recall the sums for doubles facts, they can be used to help with facts that have an addend with one more.
Children learn to apply their knowledge of doubles to subtraction.
You can also add a number to 10 by counting on from 10 to find the sum. Add the 3 to the 10. A related addition fact can be used to help solve a subtraction fact. The fact table below shows the strategies that can be used with addition facts. All Rights Reserved.