Adding and Subtracting Fractions with Models

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Tags

CCSS.3.NF.A.3D

Add

4/6 + 2/6

• 1 or 6/6

• 8/36

• 1 2/6 or 8/6

• 8/12

Tags

CCSS.4.NF.B.3A

Add

4/12 + 5/12

• 9/12

• 9/144

• 20/144

• 20/12

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Add

2/12 + 3/12

• 5/24

• 5/12

• 6/144

• 6/12

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

• A

• B

• C

• D

Tags

CCSS.4.NF.B.3A

Simply the following fraction model.

Answer explanation

The shaded area is the top number (numerator). The total boxes in one shape is the bottom number (denominator). If the numerator and denominator are the same then the answer is 1.

Tags

CCSS.4.NF.B.3A

Add

3/4 + 1/4

• 3/4

• 3/16

• 4/4

• 3/8

Tags

CCSS.4.NF.B.3A

Add

2/8 + 3/8

• 6/8

• 5/8

• 6/64

• 5/16

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Add

1/2 + 1/2

• 1/2

• 2/4

• 1/4

• 1 or 2/2

Tags

CCSS.4.NF.B.3A

Which model fits the word problem below:

Jameer had 9/12 of a cup of water and Mason poured 2/12 of a cup more in to his glass. How much water does Jameer have now?

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Tags

CCSS.4.NF.B.3A