Common Core
2.NBT.B.5
8 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Grade 2 Math · Chapter 4 · Lesson 1
Tens with tens, ones with ones.
Grade 2 Math · Chapter 4 · Lesson 2
When the ones fill up, bundle them.
Grade 2 Math · Chapter 4 · Lesson 3
Ten tens make a hundred, in the middle of a sum too.
Grade 2 Math · Chapter 4 · Lesson 5
Take the tens away, then the ones.
Grade 2 Math · Chapter 4 · Lesson 6
Not enough ones? Open a ten.
Grade 2 Math · Chapter 4 · Lesson 7
Open a ten, then take away as usual.
Grade 2 Math · Chapter 4 · Lesson 11
Ones under ones. Add the ones first.
Grade 2 Math · Chapter 4 · Lesson 12
Column Subtraction, Written Out
Top digit too small? Borrow a ten.