1.OA.C.6 Grade 1 · Operations & Algebraic Thinking
Add & Subtract Within 20
What your child learns
Adding and subtracting within 20 with strategies such as counting on, making ten (8 + 6 = 8 + 2 + 4 = 14) and using facts you already know, building to fluency within 10.
Try it at home
Practise the pairs that make 10 on fingers, then use them: 9 + 5 is 10 + 4.
Words to use
- make ten
- doubles
- fact fluency
