Add & Subtract Within 1000
Add and subtract within 1000 using place value, mentally add or subtract 10 or 100, and explain why strategies work.
Standards:
2.NBT.B.7, 2.NBT.B.8, 2.NBT.B.9
- I can add and subtract numbers within 1000 using place-value strategies.
- I can mentally add or subtract 10 or 100 from a three-digit number.
- I can explain why an addition or subtraction strategy works.