Subtracting Decimals
Decimals to Fractions
Rounding Decimals
Estimating Sums
& Differences
Adding Decimals
100

Subtract the decimal 16.82 - 5.21 

What is 11.61

100

Write 0.25 as a fraction in simplest form. 

What is 1/4

100

Round the decimal to the given place-value. 5.031; hundredths

What is 5.03

100

Estimate using rounding. 38.23 + 11.84

What is 38 + 12 = 51

100

Add the decimals 43.286 + 31.45

What is 74.736

200

Subtract the decimal 4.8 - 2.12 

What is 2.68 

200

Write 0.68 as a fraction in simplest form. 

What is 17/25 

200
Round the decimal to the given place-value. 0.00042; ten-thousandths
What is 0.0004
200

Estimate using Rounding. 75.38 + 22.04

What is 75 + 22 = 97

200

Add the decimals 0.724 + 6.458

What is 7.182

300

Subtract the decimal 7.8 - 4.96 

What is 2.84 

300

Mrs Buford has yarn that is 0.945 meters long. What is 0.945 as a fraction in simplest from? 

What is 189/200? 

300
Round the decimal to the given place-value. 27.35; tens
What is 27
300

Estimate using Front-End Estimation 31.29 + 58.07

What is 31 + 58 = 89

300

Add the Decimals 1.3 + 0.081

What is 1.381

400

The Pyramid of Khafre measured 143.5 meters high. The Pyramid of Menkaure measured 65.04 meters high. What is the difference in the heights of these two pyramids?

What is 78.46 meters 

400

Mrs. Hays worked 40.23 hours last week. She worked 30.13 hours this week. Write the amount of hours Mrs. Hays worked as a mixed number in simplest form. 

What is 70  9/25
400
Round the decimal to the given place-value. 3.4553; thousandths
What is 3.455
400
Estimate using clustering 12.045 + 11.81 + 12.3 + 11.56
What is 12. + 12. + 12. + 12. = 48
400

Add the decimals 48.93 + 21.365

What is 70.295

500

The average person's upper leg bone measures 19.88 in and the lower leg bone measures 16.943 in. How much longer is the upper leg bone than the lower leg bone?

What is 2.937 

500

Write the difference of 93.78 and 41.64 as a mixed number in simplest from. 

What is 52  7/50  

500
Round the decimal to the given place-value. 2.059; hundredths
What is 2.06
500

Estimate using clustering. 6.45 + 5.88 + 5.61 + 6.03

What is 6 + 6 + 6 + 6 = 24

500

Add the decimals 248 + 131.48 + 1.376

What is 380.856

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