Adding with Decimal Models

What equation matches this model?

• 0.32 + 0.17 = 0.49

• 0.32 - 0.17 = 0.49

• 0.49 - 0.17 = 0.32

• 0.49 + 0.17 = 0.32

What does the model represent?

• 0.13

• 0.31

• 31

• 3.1

What does the model represent?

• 9.10

• 0.09

• 0.9

• 0.99

The shaded model represents the decimal-

• 53

• 5.03

• 5.3

• 3.5

What is 78.32 + 6.784?

Mathematical Equivalence

ON

Which problem is represented in the model?

• 0.32 - 0.17

• 0.49 - 0.32

• 0.32 + 0.17

• 0.49 - 0.17

5.61 + 2.4

Mathematical Equivalence

ON

Which equation matches the model?

• 0.73 - 0.23 = 0.50

• 0.50 + 0.23 = 0.73

• 0.73 + 0.23 = 0.50

• 0.73 - 0.50 = 0.23

Match the following equation to the correct answer.

• 11.57

• 7.58 + 4.6

• 12.1

• 3.9 + 8.2

• 11.57

• 0.65 + 10.92

• 12.18

• 5.57 + 6

What equation matches this model?

• 0.7 - 0.44 = 1.14 

• 1.14 - 0.44 = 0.7

• 1.14 + 0.7 = 0.44

• 0.7 + 0.44 = 1.14