Testinar Grade 5 math

Estimating Products and Quotients

Students will estimate products and quotients to check whether calculations are reasonable.

CH02-03 Whole-Number Operations
Name
Date
Score
____ / 8
Directions Solve each problem. Show your reasoning on the page or on separate paper. Check the answer key only after finishing.
  1. % Test Text What is 47.863 rounded to the nearest tenth?

    1. 47.8
    2. 47.86
    3. 47.9
    4. 48.0
  2. Round 23.45 to the nearest whole number.

    Rounding Decimals visual for G5-C02-T05-Q002
    1. 23
    2. 23.4
    3. 23.5
    4. 24
  3. What is 5.678 rounded to the nearest hundredth?

    1. 5.67
    2. 5.68
    3. 5.7
    4. 6.0
  4. Round 12.542 to the nearest tenth.

    1. 12.4
    2. 13.0
    3. 12.6
    4. 12.5
  5. A number line shows the position of 3.47 between 3 and 4. What is 3.47 rounded to the nearest whole number?

    Rounding Decimals visual for G5-C02-T05-Q005
    1. 4.0
    2. 3.5
    3. 3.7
    4. 3
  6. Round 9.951 to the nearest hundredth.

    1. 9.95
    2. 9.96
    3. 10.0
    4. 9.9
  7. Maria measures 8.762 meters of ribbon. If she rounds to the nearest tenth for her project, how much does she use?

    Rounding Decimals visual for G5-C02-T05-Q007
    1. 8.7 m
    2. 8.76 m
    3. 8.8 m
    4. 9 m
  8. Round 34.196 to the nearest whole number.

    1. 34
    2. 34.1
    3. 34.2
    4. 35
Teacher and parent reference

Answer key and explanations

  1. C. 47.9

    % Explanation Text The tenths place in 47.863 is 8. The hundredths place is 6. Since 6 is greater than or equal to 5, we round the tenths digit up from 8 to 9. Therefore, 47.863 rounded to the nearest tenth is 47.9.

  2. A. 23

    The tenths place is 4. Since 4 is less than 5, round down. 23.45 rounded to the nearest whole number is 23.

  3. B. 5.68

    The hundredths place is 7. The thousandths place is 8. Since 8 \(\geq\) 5, round up from 7 to 8. So 5.678 rounds to 5.68.

  4. D. 12.5

    The tenths place is 5. The hundredths place is 4. Since 4 < 5, keep 5. So 12.542 rounds to 12.5.

  5. D. 3

    3.47 is between 3 and 4, but closer to 3 because the tenths digit 4 is less than 5. It rounds down to 3.

  6. A. 9.95

    The hundredths place is 5. The thousandths place is 1. Since 1 < 5, keep the hundredths digit the same. So 9.951 rounds to 9.95.

  7. C. 8.8 m

    The tenths place is 7, hundredths is 6. Since 6 \(\geq\) 5, round up: 7 becomes 8. Maria uses 8.8 meters.

  8. A. 34

    The tenths digit is 1. Since 1 < 5, round down. 34.196 rounded to the nearest whole number is 34.

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