Worksheet: Estimating Sums of Two-Digit Numbers: Rounding

In this worksheet, we will practice estimating the sum of two-digit numbers by rounding to the nearest ten.

Q1:

Which number is nearest to 30+19?

  • A30
  • B50
  • C40
  • D80

Q2:

Choose the number that is closest to 53+83.

  • A300
  • B100
  • C200

Q3:

Estimate 22+14 by rounding the numbers to the nearest tens.

Q4:

Michael and Daniel are picking apples from an apple tree. If Michael picks 24 apples and Daniel picks 18 apples, estimate the number of apples they both have by rounding the numbers to the nearest ten.

Q5:

Estimate 27 + 14 by rounding each number to the nearest ten.

Q6:

Estimate 23+36 by rounding the two numbers to the nearest ten using the number line.

Q7:

Estimate 35+42 by rounding the two numbers to the nearest ten using the number line.

Q8:

Estimate the sum of 16+28 by rounding the two numbers to the nearest ten using the number line.

Q9:

Estimate the sum by rounding each number to the nearest ten: 54+28

Q10:

Estimate 26+15 by rounding the numbers to the nearest tens.

Q11:

Michael bought two books. One cost him $24, and the other cost him $11. Estimate how much he paid for the two books by rounding each price to the nearest ten.

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