SME
Grade 3 Math

Fluently add and subtract within 1,000

The main lesson, then each kind of problem it solves.

Fluently add and subtract within 1,000

Main lesson
Subtract three-digit numbers with zeros
Use this for “Find the value of 400 − 162” or “503 − 207.”
Addition and subtraction word problems within 1,000
Use this for “The library had 526 books. It lent out 248. How many are left?”
About us
Plans
Support
Terms
Privacy
Copyright
© 2026 SME. All rights reserved.