Estimating
Adding Fractions
Subtracting Fractions
Adding mixed numbers
Subtracting mixed numbers
100

What is the BEST estimate for 7/8 - 6/10 

1/2 

100

1/4 + 1/4

2/4

100

3/4 - 1/4

2/4

100

2 and 2/5 + 1 and 1/4 

3 and 13/20 

100

7 3/4 - 5 2/4

2 1/4

200

What is the best estimate for 9/10 + 1/12 

1 + 0 = 1 

200

4/6 + 1/12 = 

9/12 

200

5/8 - 2/8

3/8

200

2 1/4 + 1 1/4

3 2/4

200

13 3/10 - 6 7/10

5 6/10

300

What is the best estimate for 4/8 - 3/5 

1/2 - 1/2 = 0 

300

1/2 + 1/4

3/4

300

5/6 - 2/3=

1/6 

300

5 and 1/3 + 3 and 3/7 = 

8 16/21 

300

4 and 1/2 - 1 and 6/8 = 

2 and 6/8 

400

What is the best estimate for 11/12 + 2/5 

1 + 1/2 = 1  1/2 

400

2/5 + 2/5

4/5

400

4/5 - 2/3 = ? 

2/15 

400

2 and 4/9 + 1 and 1/4 

3 and 25/36 

400
Jesus runs 6 and 3/8 laps around a track. Rory runs 3 and 3/4 laps around the track. How many MORE laps does Jesus run than Rory? 

2 and 5/8 more laps 

500

What is the best estimate for 3 2/10 + 1 1/6 

3 + 1 = 4 

500

8/9 + 4/9


Change improper to mixed number 

1 3/9

500

1/2 - 1/5 = ?

3/ 10 

500

Sayef is making a recipe for cookies. The recipe requires 1 and 3/6 cup of light brown sugar AND 2 and 1/4 cups of dark brown sugar. How much sugar does Sayef need IN ALL? 

3 and 9/12

500
Mariah has 3 and 1/2 cups of flour. She uses 2 and 1/3 cups to make a pizza crust. If she needs 2 cups of flour to make a cake, does Mariah have enough flour LEFT to ALSO make a cake? 

NO she needs 5/6 cups MORE FLOUR (; 

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