Estimation Nation
The Sum of Things
What's the Diff, Dude?
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100

2 3/4 + 3 3/10

6

100

2 1/4 + 1 2/5

3 13/20

100

4 7/12 - 1 2/9

3 13/36

100

2 1/6 + 4 5/9

6 13/18

100

Find the difference:  11 1/9 - 3 2/3 = 

7 4/9

200

3 4/5 + 2 3/10

6

200

1 5/12 + 4 1/6

5 7/12

200

5 6/7 - 1 2/3

4 4/21

200

6 3/4 - 1 5/8

5 1/8

200

Estimate:  8 - 6 1/9 = 

2

300

9 - 3 7/8

5

300

3 5/8 + 5/12

4 1/24

300

5 17/18 - 2 2/3

3 5/18

300

4 1/8 + 2 1/3

6 11/24

300

Mrs. Rhein has a goal to jog 4 1/2 miles each day.  On Monday, she jogged 5 9/16 miles.  By how much did she exceed her goal for that day?

Mrs. Rhein exceeded her goal by 1 1/16 miles.





400

5 3/4 + 1 1/3

7

400

5 1/3 + 6 1/6

11 1/2

400

13 1/6 - 3 4/5

9 11/30

400

1 1/5 - 1/2

7/10

400

At the deli, Ricardo ordered 3 1/5 pounds of cheddar cheese and 2 3/4 pounds of mozzarella cheese.  How many pounds of cheese did he order altogether?

Ricardo ordered 5 19/20 pounds of cheese altogether.

500

9 1/4 - 3 2/3

5

500

8 1/2 + 6 3/5

15 1/10

500

5 3/7 - 2 1/5

3 8/35

500

2 1/3 + 1 3/4

4 1/12

500

Peter spent 6 hours total painting a mural.  He spent 1 1/4 hours planning his mural on paper, and then 2 1/3 hours sketching it onto the wall.  The rest of the time was spent painting  How much time did Peter spend painting?

Peter spent 2 5/12 hours painting.