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Estimation
Adding/Subtracting with Unlike Denominators
Word Problems
Adding/Subtracting with Like Denominators
Adding/Subtracting Mixed Numbers
100

Estimate the sum:

7/8 + 4/5

What is about 2

100
Solve. 7/9 + 1/6
What is 17/18
100

Ms. Lee picked 1/2 kilogram of strawberries in the morning and 1/4 kilogram in the afternoon.
How many kilograms did she pick in total?

What is 3/4 kilogram

100
Solve, write in simplest form. 4/9 + 1/9
What is 5/9
100
Solve, write in simplest form. 1 3/4 + 3 1/8
What is 4 7/8
200

Estimate the sum:

 3 2/3 + 1 5/6

What is about 6

200
Solve, answer in simplest form. 2/3 - 5/12
What is 1/4
200

Ms. Rivera had 2 5/6 liters of paint. She added another 1/3 liter.
How many liters of paint does she have now?

What is 3 1/6 liters.

200
Solve, write in simplest form. 8/12 + 5/12
What is 1 1/12
200
Solve, write in simplest form. 3 5/6 + 2 2/3
What is 6 1/2
300

A ribbon is 10 1/4 inches long.
6 2/5 inches are used.
Estimate how much ribbon is left.

What is about 4 inches

300
Wally took 1/6 of the stickers from the pack. Alex took 1/2 of the stickers. How much more of the pack did Alex take?
What is 1/3
300

A rope is 7 5/6 meters long.
If 2 1/3 meters are cut off, how many meters of rope remain?

What is 5 1/2 meters of rope

300
Solve, write in simplest form. 10/15 + 5/15
What is 1
300
Bobby has 5 1/6 yards of red yarn and 2 5/6 yards of blue yarn. How many yards of yarn does she have in all?
What is 8 yards
400

Which is the best estimate for
9/10 + 3/4

A. 1
B. 1½
C. 2
D. 3

 

What is C. 2

400
Sonya takes gymnastics and dance. Today she practiced gymnastics for 3/4 hour and dance for 1/2 hour. How many hours did Sonya spend practicing both activities?
What is 1 1/4 hours
400

Mrs. Park collected 3/4 kilogram of tomatoes from one garden and 5/8 kilogram from another.
How many kilograms of tomatoes did she collect in all?

What is 1 3/8 kilograms

400
Solve, write in simplest form. 9/18 + 1/18
What is 5/9
400
Solve, write in simplest form. 5 3/4 - 5 3/8
What is 3/8
500

Part 1:Estimate
5 7/8−1 1/3


Part 2: Explain how you chose your estimate.

Part 1: about 4

Part 2 Example: I rounded 5 7/8 to 6 and 1 1/3 to 1. Then I subtracted.

500
Buster bough 3/8 pound of gummy bears, 1/8 pound of sour patch kids, and 5/6 pound of Skittles. What is the total weight of the candy that Buster bought? Write in simplest form.
What is 1 1/3 lbs
500

A pitcher holds 4 2/3 liters of lemonade. After pouring out 1 5/6 liters, how much lemonade is left?
Explain how you know your answer makes sense.

What is 2 5/6 liters?

500
Of the students in Mrs. Bybee's class, 11/24 walk to school. Another 3/24 of the students ride their bikes to school. What fraction more of the students walk than ride their bikes? Answer in simplest form.
What is 1/3
500
Solve, write in simplest form. 97 9/10 + 15 1/10
What is 113