Estimating & Rounding
Multiplying
Dividing
Rounding
Word Problems
100
Round to the nearest whole number to estimate the sum. What is 13.65 + 2.35 =
14 + 2 = 16
100
4.5 x 6
27
100
2.3 divided by 10 =
0.23
100
Round to the nearest tenth. 456.51
456.5
100
A stick is 7 meters long. It's cut into 4 equal pieces. How long is each piece?
1.75 meters each
200
Round to the nearest whole number to estimate the sum. 87.02+ 20.99 =
87 + 21 = 108
200
Multiply. 146.6 x 8 =
1,172.8
200
365.45 divided by 100 =
3.6545
200
Round to the nearest hundredth. 98.085
98.09
200
A stick is 3 meters long. It's divided evenly into 8 pieces. How long is each piece? Round your answer to the nearest hundredth.
Step 1: 3 divided by 8 = 0.375 Step 2: 0.375 rounded to the nearest hundredth is 0.38. Answer = 0.38 meters
300
Round to the nearest whole number to estimate the difference. What is 27.89 - 14.22 =
28 - 14 = 14
300
Multiply. Round the product to the tenths place. 14.56 x 9 =
Actual answer = 131.04 Rounded = 131.0
300
5.4 divided by ____= 0.6
9
300
Round to the nearest thousandth. 1,456.0986
1,456.099
300
A container of salt weighs 18 pounds. A chef has one container of salt. If he uses 1.065 pounds of salt each day, how much salt is left after 10 days? Show your steps.
Step 1: 1.065 x 10 = 10.65 Step 2: 18 - 10.65 = 7.35 Solution: There is 7.35 pounds of salt left after 10 days.
400
Round to the nearest whole number to estimate the difference. 145.49 - 48.89 =
145 - 49 = 96
400
Multiply. Round your answer to the nearest whole number. 134.9 x 12 =
Actual answer = 1,618.8 Rounded = 1,169
400
52.8 divided by 4 =
13.2
400
Round to the nearest whole number. 799.54
800
400
Mrs. Falkner buys 3 shirts that cost $38.80 each. Estimate the number of $10 bills she will need for her purchase.
Step 1: $38.80 is almost $40. Step 2: $40 x 3 = $120 so the total cost of 3 shirts is about $120. Step 3: $120 divided by $10 = 12 Ms. Falkner will need at least 12 $10 bills to buy her shirts.
500
Round to the nearest whole number to estimate the sum. 1,346.69 + 1001.99 =
1,347 + 1,002 = 2,349
500
55.67 x 1,000 =
55,670
500
56,789 divided by _____ = 567.89
100
500
7.65 x 3 = _______ Round your answer to the tenths place.
Actual answer 22.95 Rounded = 23.0
500
Sam bought 2 candy bars for $2.75 each. He also bought 4 water bottles for $1.05 each. How much money did Sam spend?
Step 1: $2.75 x 2 = $5.50 (amount spent on candy bars) Step 2: $1.05 x 4 = $4.20 (amount spent on water) Step 3: $5.50 + $4.20 = $9.70 Sam spent $9.70
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