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Worksheet: Estimating Sums and Differences by Rounding

In this worksheet, we will practice estimating the sum or difference between integers up to four digits using compatible numbers.

Q1:

Choose the number that is closest to 8 4 + 8 2 .

  • A300
  • B100
  • C200

Q2:

Choose the number that is closest to 5 3 + 8 3 .

  • A300
  • B200
  • C100

Q3:

Choose the number that is closest to 1 1 0 + 3 6 8 .

  • A600
  • B400
  • C500

Q4:

Which number is nearest to 4 3 5 + 1 6 9 − 1 9 9 ?

  • A600
  • B500
  • C400

Q5:

Which is closest to 7 9 0 9 − 3 4 5 7 ?

  • A 2 000
  • B 1 000
  • C 3 000
  • D 4 000
  • E 5 000

Q6:

Which number is nearest to 4 , 8 7 7 + 3 , 1 0 3 ?

  • A 9,000
  • B 7,000
  • C 10,000
  • D 8,000
  • E 6,000

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