Rounding and Estimation Quiz

Grade 3 · Math · Quiz

Test your skills in rounding to the nearest ten and hundred and using estimation.

Questions

Round 63 to the nearest ten.
1. 50
2. 60
3. 70
4. 65
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Answer: 60
63 has a ones digit of 3, which is less than 5, so round down to 60.
Round 550 to the nearest hundred.
1. 500
2. 550
3. 600
4. 560
Show answer
Answer: 600
550 has a tens digit of 5, so round up to 600.
A school has 387 students. About how many students rounded to the nearest hundred?
1. 300
2. 380
3. 390
4. 400
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Answer: 400
387 has a tens digit of 8, which is 5 or more, so round up to 400.
Which is the best estimate for 49 + 52?
1. 90
2. 100
3. 110
4. 120
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Answer: 100
49 rounds to 50 and 52 rounds to 50. 50 + 50 = 100. The exact answer is 101, very close.
Rounding 714 to the nearest hundred gives 700.
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Answer: True
714 has a tens digit of 1, which is less than 5, so round down to 700.
Which number rounds to 400 when rounded to the nearest hundred?
1. 348
2. 452
3. 350
4. 449
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Answer: 449
449 has a tens digit of 4, which rounds down to 400. 452 rounds up to 500.
Round 95 to the nearest ten: ___.
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Answer: 100
95 has a ones digit of 5, so round up. The next ten after 90 is 100.
Sam estimated 72 - 38 by rounding to the nearest ten. What was his estimate?
1. 30
2. 34
3. 40
4. 44
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Answer: 30
72 rounds to 70 and 38 rounds to 40. 70 - 40 = 30.