Adding decimals
Finding the difference of decimals
Estimate - round to nearest whole number
Estimate - round to nearest tenth
Models
100

What is the sum?

5.34 + 3.8

9.14

100
What is the difference? 


17.6 - 13.4

4.2

100

Round to the nearest whole number

13.823

14

100

Round this number to the nearest tenth

1.29

1.3

100

Model #1 - what number is shown?

1.91

200

Sally bought a new shirt for $15.75 and a hat for $12.03. How much did Sally spend in all?

27.78

200

What is the difference? 

14.2 - 5.5

8.7

200

Round to the nearest whole number

8.299

8

200

Round this number to the nearest tenth

40.44444444

40.4


200

Model #2 - What number is shown?

1.79

300

Morgan built 3 book shelves. The top shelf is 2.9 feet long, the middle shelf is 4.33 feet long and the bottom shelf is 3.67 feet long. What is the combined length of the 3 bookshelves? 

10.9 feet

300

Find the difference

12.33 - 5.5

6.83


300

Estimate the sum of 10.2 + 4.9 + 2.2 by rounding to the nearest whole number

17

300

A rectangular office space has a length of 46.15 feet and a width of 19.85 feet. Round the length and width to the nearest tenth.

46.2 = length

19.9 = width 


300

Model #3 - What number is shown?

2.34

400

Which decimal would make the equation true?

8.6 + ___ = 27.3

18.7

400

If my total at the shoe store was $70.50 and I paid with 4 twenty-dollar bills. How much change should I get back?

$9.50

400

I spent $39.50 grocery shopping and $50.22 on gas. Round to the nearest whole number to see estimate how much money I spent total

$90

400

Round this number to the nearest tenth

8.98

9

400

Model #4 - What number is shown?

1.15

500

What decimal would make this equation true?

4.25 + ___ = 12.98

8.73

500

I sold 9.3 pounds of vegetables and my roommate sold 4.67 pounds. What is the different between the number of pounds sold?

4.63

500

A table has a length of 6.49 feet and a width of 9.99. Round to the nearest whole number to estimate the length and widths.

length = 6

width = 10

500

Two crystals weigh 67.25 grams and 12.87 grams. What is the estimated total mass if you round to the nearest tenth?

80.2

500

Model #5 - What number is shown?

1.04


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