Rounding
Estimation
Addition
Subtraction
Word Problems
100

Round these decimals to the nearest whole number: 

18.5, 9.4, 25.6

19, 9, 26

100

Estimate this equation to the nearest whole number, show work and answer: 

1890.4 + 8.00 

1890 + 8 = 1898 

100

Add these decimals together and show your work: 

8.98 + 7.60 = ? 

16.58


100

Subtract these decimals and show your work:

17.99 - 7.99 = ?

10.00 or 10

100

Mr. Wong has $1400.1 in savings. He went out to buy a cat tree worth $1300.1, how much money does Mr. Wong have now? (Show equation, work and math sentence)


(-)

1400.1 - 1300.1 = 100

Mr. Wong will have $100 left. 

200

Round these decimals to the nearest tenth: 

10.85, 25.62, 8.51

10.9, 25.6, 8.5

200

Estimate this equation by rounding to the nearest whole number, show work and answer: 

3.66 + 4.04 = ? 

4 + 4 = 8

200

Add these decimals together and show your work:

34.56 + 12.34 = ?

46.90 or 46.9

200

Subtract these decimals and show your work:

98.76 - 54.32 = ? 

44.44


200

Peach the cat was building cat trees in her backyard. The first cat tree that she built was 209.18cm. The second cat tree she built measured 265.29 cm. What is the total length of the two cat trees in cm? (Show equation, work and math sentence)

(+)

209.18 + 265.29 = 474.47

The total length of the two cat tress is 474.47cm 

300

Round each decimal to the nearest tenth:

0.77, 0.13, 0.07 

0.8, 0.1, 0.1

300

Estimate this equation by rounding, show work and answer: 

0.92 - 0.7 = ? 

1 - 1 = 0

300

Add these decimals together and show your work:

67.89 + 123.45 = ?

191.34

300

Subtract these decimals and show your work:

145.67 - 23.45 =? 

122.22

300

Mikko the cat saved 1458.90 cat kibbles to eat at a later time. He finally got hungry so he ate 36.25 cat kibbles for brunch. How many cat kibbles will he have left after eating brunch? (Show equation, work and math sentence)

(-)

1458.90 - 36.25 = 1422.65

Mikko will have 1422.65 cat kibbles left to eat. 

400

Round each decimal to the nearest whole number: 

12.4, 129.8, 87.78

12, 130, 88 

400

Estimate this equation by rounding, show work and answer: 

13.98 + 0.99 = ? 

14 + 1 = 15

400

Add these decimals together and show your work:

78.21 + 45.67 + 123.45 + 67.89 = ?

315.22

400

Subtract these decimals and show your work:

145.67 - 23.45 - 98.76 = ? 

23.46

400

Mikko and Peach love Tiki cat food. They want to buy a whole case which has 24 cans in it. Their favourite cans cost $3.59. They decided to get 24 cans. How much money do they need to get the whole case of Tiki Cat food? (Show equation, work and math sentence)

(+) 

3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 + 3.59 = $86.16 

Mikko and Peach need $86.16 to purchase a whole case of Tiki Cat food. 

500

Round each decimal to the nearest tenth and then to the whole number: 

589.95, 1817.34, 999.99 

591 or 590, 1817, 1000  

500
Estimate this equation by rounding show work and answer: 


89.98 + 61.2 + 777.77 + 71.85 - 1000 = ? 

90 + 61 + 778 + 72 - 1000 = 1

500

Add these decimals together and show your work:

78.21 + 45.67 + 123.45 + 67.89 + 34.56 + 12.34 = ?

362.12

500

Subtract these decimals and show your work:

589.27 - 145.67 - 98.76 - 23.32 - 54.32 - 265.20 = ?

2
500

Peach and Mikko decided they wanted to build a cat fortress in their living room. In total, they have $5289.67 to spend on their cat fortress. They buy a cat tree that is worth $289.52. They decide they need more cat trees so they buy two more, one is worth $3598.10 and the other one is worth $401.10. Lastly, they needed some blankets so they bought $990.95 worth. How much money do they have left? (Show equation, work and math sentence) 

(-) or (+) and (-)

5289.67 - 289.52 - 3598.10 - 401.10 - 990.95 = 10 

Mikko and Peach have $9 dollars left after buying all the items for their cat fortress. 



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