Model Add and Subtract Decimals

3.3 + 2.22=

• 5.52

• 5.55

• 5.77

• 5.4

34 + 10.18 = 

• 44.18

• 4418

• 10.52

• 24.18

15.07 - 12.2=

• 2.87

• 1.87

• 3.87

• 2.80

Which problem is represented in the model?

• 0.32 - 0.17

• 0.49 - 0.32

• 0.32 + 0.17

• 0.49 - 0.17

-12.4 + 9.2 + 1 

Mathematical Equivalence

ON

Which problem is represented by this model? BE CAREFUL!

• 0.27 - 0.9

• 0.18 + 0.09

• 0.9 + 0.18

• 0.27 - 0.09

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 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

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

6.7 - 2.33=

• 4.43

• 4.4

• 4.37

• 4.47