Adding and Subtracting Mixed Numbers using steps and models

Emma’s cat had a litter of 8 kittens. Emma gives 1 kitten to her uncle and 1 kitten to her cousin. What fraction of the litter of kittens does Emma have LEFT? Write your answer as a fraction.

• 6/8

• 3/8

• 2/8

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

(Part 2 to Emma Quesiton)

(2 were taken away from the 8, now there are 6 total) Emma gives 4/6 of the remaining kittens to friends. How many kittens does Emma have LEFT?

• 1/6

• 2/6

• 3/6

• 4/6

Tags

CCSS.7.NS.A.3

5. Jarrod is adding the mixed numbers:

3 2/6 and 7 5/6

He uses these steps to find the sum.

Step 1: 3 + 7 = 10

Step 2: 2/6+5/6=7/12

Step 3: Answer is 10 7/12

What mistake did Jarrod make?

• In Step 1, he should have multiplied 3 and 7 by 6 before adding.

• In Step 2, he should not have added the denominators.

• In Step 2, he should have multiplied 2 and 5 instead of adding them.

• In Step 3, he should not have added the whole number and fraction.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Solve 10 1/8 - 4 5/8

using regrouping

• 6 6/8

• 7 1/8

• 3 4/8

• 5 4/8

Tags

CCSS.7.NS.A.1C

7 1/12 + 6 6/12

Using the three step strategy

• 1 7/12

• 7/12

• 13 7/24

• 13 7/12

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

8. Indianapolis had 1 1/10 inches of snow in November. In December, they had 5 2/10 inches of snow. In January,

they had 6 inches of snow. What is the total number of inches of snow?

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Indianapolis had 1 1/10 inches of snow in November. In December, they had 5 2/10 inches of snow. In January, they had 6 inches.

How much more snow did Indianapolis have in January than November?

Tags

CCSS.7.NS.A.3

What number is shown in this model?

• 3 2/3

• 11/12

• 4 2/3

Tags

CCSS.3.G.A.2

What number is shown to you in the model?

• 2 2/5

• 12/15

• 2 3/5

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B