Adding Decimals
Subtracting Decimals
What's The Problem?
Rounding Decimals
Estimating Decimals
100
Add the decimals 43.28 + 31.45
What is 74.73
100
Subtract the decimals 24.56 - 18.23
What is 6.33
100
If 58 out of 100 students in a school went Trick or Treating last nigh, then write a decimal for the part of the school that consists of Trick or Treaters.
What is 0.58
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 38.2 + 11.8 = 50
200
Add the decimals 0.724 + 6.458
What is 7.182
200
Subtract the decimals 248 - 131.48
What is 116.72
200
Five swimmers are entered into a competition. Four of the swimmers have had their turns. Their scores are 9.8 s, 9.75 s, 9.79 s, and 9.81 s. What score must the last swimmer get in order to win the competition?
We must order these decimals from least to greatest. Then we must determine how the least compares with the winning score.
9.80
9.75
9.79
9.81
The least decimal is 9.75. Now we must determine how 9.75 compares with the winning score.
200
Round the decimal to the given place value. 27.35; tens
What is 27
200
Estimate using Rounding. 75.38 + 22.04
What is 75.4 + 22 = 97.4
300
Add the Decimals 1.325 + 0.081
What is 1.406
300
Subtract the decimals 178.38 - 159.49
What is 18.89
300
An armadillo travels 237.4 meters from its nest and catches a beatle. The armadillo travels the same distance back to its nest. How many meters does the travel?
What is 474.8 meters
300
Round the decimal to the given place value. 0.00042; ten-thousandths
What is 0.0004
300
Estimate using Rounding 31.29 + 58.07
What is 31.3 + 58.1 = 89.4
400
Add the decimals 1,023.45 + 284.62
What is 1,308.07
400
Subtract the decimals 148.93 - 121.36
What is 27.57
400
Rahma wanted to buy the following items: A DVD player for $49.95, a DVD holder for $19.95 and a personal stereo for $21.95. Does Ellen have enough money to buy all three items if she has $90 with her?
What No.
400
Round the decimal to the given place value. 3.4553; thousandths
What is 3.455
400
Estimate using rounding 12.045 + 11.81 + 12.3 + 11.56
What is 12.05 + 11.8 + 12.3 + 11.6 = 47.75
500
Add the decimals 1,927. 48 + 1,762.39
What is 3,689.87
500
Subtract the decimals 1,023.14 - 98.57
What is 924.57
500
If a 10-foot piece of electrical tape has 0.037 feet cut from it, then what is the new length of the tape?
What is 9.963 ft.
We need to subtract: 10 - 0.037 and express the answer with proper units.
500
Round the decimal to the given place value. 2.059; hundredths
What is 2.06
500
Estimate using rounding. 6.45 + 5.88 + 5.61 + 6.03
What is 6.5 + 5.9 + 5.6 + 6 = 24