1.OA.B.3 Grade 1 · Operations & Algebraic Thinking
Smart Ways to Add & Subtract
What your child learns
Using properties of operations as strategies: 8 + 3 is the same as 3 + 8, and 2 + 6 + 4 can be added as 2 + 10.
Try it at home
Ask whether 4 + 9 and 9 + 4 give the same answer, and which is quicker to count on. Look for pairs that make 10.
Words to use
- turn-around facts
- make ten
- strategy
