Represent Decimal Subtraction Using Models

Subtracting Decimals: Use the grid method to subtract 0.5 from 0.9

• 0.3

• 0.7

• 1.2

• 0.4

Does this model represent addition or subtraction?

• addition

• subtraction

Subtracting Decimals: Use the grid method to subtract 0.3 from 0.7

• 0.6

• 0.5

• 0.4

• 0.8

Which of the following expressions matches the grid shown?

• 0.57 + 0.33 = 0.90

• 0.33 - 0.24 = 0.09

• 0.57 - 0.33 = 0.24

• 0.43 - 0.33 = 0.24

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

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

What equation matches the strip diagram?

• $7,362.36 - $4.892.49 = L

• $7,362.36 + $4.892.49 = L

• $4.892.49 - $7,362.36 = L

•  $7,362.36 + L = $4.892.49

What is this image an example of?

2 answers!

• Subtracting using models

• Subtracting using partial sums

• Subtracting using drawings

Add or subtract?

• Add

• Subtract