1.NBT.C.6 Grade 1 · Number & Operations in Base Ten
Subtract Tens
What your child learns
Subtracting multiples of 10 from multiples of 10 in the range 10 to 90, such as 70 − 30, by thinking in tens.
Try it at home
Use dimes or bundles of ten: take 3 tens away from 7 tens. How many tens are left, and what number is that?
Words to use
- tens
- subtract
- multiples of ten
