Worksheet: Estimating Differences between Two-Digit Numbers: Rounding

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

Q1:

Scarlett wants to estimate 4217.

She decides to round the numbers to the nearest ten.

Pick the calculation she should do to estimate.

  • A5020
  • B4010
  • C5010
  • D4020

Estimate 4217.

Q2:

Look at how Noah estimated the difference by rounding to the nearest ten.

4331 is about 10.

Estimate the difference by rounding to the nearest ten.

5721 is about .

Estimate the difference by rounding to the nearest ten.

5328 is about .

Q3:

The teacher asked Jackson and Benjamin to find the estimated result of 6429 by rounding numbers to the nearest ten. Jackson said, “The estimated result is 30,” but Benjamin said, “The estimated result is 40.” Who is correct?

  • ABenjamin
  • BJackson

Q4:

A student wants to estimate the result of 5339 by rounding the numbers to the nearest ten. Which number line represents the correct way to round these numbers?

  • A
  • B
  • C
  • D

Use this rounding to estimate the result of 5339.

Q5:

Mia wants to estimate the difference between 56 and 41. She says: “If we round both numbers to the nearest 10, the estimated difference is 20”. Is Mia’s statement true or false?

  • ATrue
  • BFalse

Q6:

Estimate 3621 using rounding to the nearest ten.

Q7:

Estimate the result of 7834 by rounding to the nearest ten.

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