1. Shortcuts in Addition
By Monica Yuskaitis

2. 4 + 2 + 5 + 1 = 12 1 + 4 + 5 + 2 = 12 Adding Long Columns
Since addition is Commutative it doesn’t matter which numbers you add first.
= 12
= 12

3. Adding Long Columns
Begin by looking for combinations of ten. 34 57 83 26 +

4. 34 57 83 26 Adding Long Columns Add up your ten combinations first. +

5. 34 57 83 26 Adding Long Columns Add up your ten combinations again. +
2 0

6. Review Combinations of Ten9
= = 10
= = 10
= = 10
= = 10
=10 5 2 3 8 4 6 7 1

7. Adding Long Columns
When a number keeps repeating use multiplication. 2 32 36 88 26 + 8

8. Adding Long Columns
When a number keeps repeating use multiplication. 2 32 36 88 26 +
2 1 8