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Estimating Decimals

Estimating Decimals. Rounding Rules. The digit to the right is greater or equal to 5 , round up The digit to the right is less than 5 , round down. Rounding Jingle. 4 and less let it rest, 5 and up bump it up. Guided Practice. Round each decimal to the nearest whole number. 5 .39 =

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Estimating Decimals

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  1. Estimating Decimals

  2. Rounding Rules • The digit to the right is greater or equal to 5, round up • The digit to the right is less than 5, round down

  3. Rounding Jingle 4 and less let it rest, 5 and up bump it up

  4. Guided Practice Round each decimal to the nearest whole number. • 5.39 = • 43.27 = • 16.892 = • 51.508 = • 99.83 =

  5. Guided Practice Round each decimal to the nearest tenth. • 57.16 = • 38.891 = • 3.1974 = • 17.753 = • 29.987 =

  6. Guided Practice Round each decimal to the nearest hundredths. • 4.468 = • 3.761 = • 38.997 =

  7. Guided Practice Estimate each sum or difference. • 3.96 + 8.31 = • 9.67 – 3.81 = • 5.75 + 4.04 = • 11.2 – 9.67 =

  8. Problem Solving Camera film costs $3.99 a roll. Wes needs 3 rolls to take pictures of the class party. He has $15. Does he have enough money? Yes

  9. Problem Solving Flowers cost $5.99 a dozen. Faye wants to buy 2 dozen flowers. She also wants to buy a balloon that cost $4.50. Faye has $20. Does Faye have enough money to buy everything she wants? Yes

  10. Problem Solving Eric bought pretzels for $1.89, peanuts for $2.39, and popcorn for $0.99. How much did he spend in all? Answer: $5.27

  11. Problem Solving A party is scheduled to last one hour. Mrs. Call wants to show a video that lasts between 10 to 15 minutes. About how much time will be left for other activities? Answer: about 45-50 minutes

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