Mental Math ~ Addition

Click the strategy that was used to solve this problem:

38 + 57

57 = 55 + 2

38 + 2 = 40

40 + 55 = 95

• Break Apart

• Make a 10

• Make a 100

Tags

CCSS.2.NBT.B.5

CCSS.2.NBT.B.6

CCSS.2.NBT.B.7

Click the strategy that was used to solve this problem:

123 + 156

123 = 100 + 20 + 3

156 = 100 + 50 + 6

100 + 100 = 200

20 + 50 = 70

3 + 6 = 9

200 + 70 + 9 = 279

• Break Apart

• Make a 10

• Make a 100

Tags

CCSS.2.NBT.A.1

CCSS.2.NBT.B.5

CCSS.2.NBT.B.7

Click the strategy that was used to solve this problem:

595 + 146

146 = 141 + 5

595 + 5 = 600

600 + 141 = 741

• Breaking Apart

• Make a 10

• Make a 100

Tags

CCSS.2.NBT.A.1

CCSS.2.NBT.B.7

CCSS.2.NBT.B.9

Use mental math to add:

29 + 536 =

Type your answer below.

Tags

CCSS.2.NBT.B.5

CCSS.2.NBT.B.7

Use mental math to add 132 + 122 =

Type your answer.

Tags

CCSS.2.NBT.B.7