Common Core: 3.NBT — Number & Operations in Base Ten
Grade 3 • mental-math • Easy
Using Properties 1
Commutative and associative
10 problems
1.
Break Apart
16 + 5 =
Show your thinking:
2.
Break Apart
16 + 12 =
Show your thinking:
3.
Break Apart
16 + 10 =
Show your thinking:
4.
Break Apart
17 + 9 =
Show your thinking:
5.
Break Apart
17 + 8 =
Show your thinking:
6.
Break Apart
18 + 6 =
Show your thinking:
7.
Break Apart
18 + 5 =
Show your thinking:
8.
Break Apart
19 + 12 =
Show your thinking:
9.
Break Apart
19 + 11 =
Show your thinking:
10.
Break Apart
20 + 9 =
Show your thinking: