Add and Subtract Fractions Unlike

6/7 - 2/3 =

• 32/21

• 4/21

• 1 3/21

• 7/21

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

8/9 - 1/3 = 

• 7/6

• 5/9

• 2/3

• 8/27

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Is the problem solved correctly?

• Yes, the student added correctly.

• No, you cannot add unlike denominators

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common denominator you could use to change 1/3 and 1/4 into equivalent fractions?

• 3

• 4

• 24

• 12

What is the first step in solving this problem?

• Add the numerators (top numbers), then add the denominators (bottom numbers).

• Rewrite the fractions in the simplest form.

• Find the common denominator for each fraction, then make equivalent fractions.

• Change each fraction into improper factions.

Tags

CCSS.7.NS.A.1C

Look at the problem. What step is taking place?

• Add the numerators, then add the denominators

• Add the denominators (3 + 4 = 7).

• Simplify the answer

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 2

• 14

• 7

• 28

Carefully following a recipe, Ben used exactly 5/8 of a cup of oil and 3/4 of a cup of water. How many cups of liquid did Ben use in all?

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

You go out for a long walk. You walk 3/4 mile and then sit down to take a rest. Then you walk 3/8 of a mile. How far did you walk altogether?

• 3/8

• 1/12

• 1 1/8

• 1/2

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 18

• 24 

•   27

• 36 

• 45