# Worksheet: Estimating Sums and Differences: Four-Digit Numbers

In this worksheet, we will practice estimating sums and differences between numbers with up to four digits by rounding to the nearest ten, hundred, and thousand.

**Q1: **

Which is closest to ?

- A3,000
- B4,000
- C2,000
- D5,000
- E1,000

**Q3: **

Estimate , rounding each number to the hundreds place.

**Q4: **

Estimate , rounding each number to the tens place.

**Q5: **

A mountain climber in the United States climbed Mount Hayes of height 4,216 m and Mount Gould of height 3,966 m. Rounding each height to the tens place, estimate the total height that the climber climbed.

**Q6: **

Estimate , rounding each number to the hundreds place.

**Q7: **

The lengths of two rivers in Russia, the Lena River and the Vitim River, are 4,294 km and 1,837 km. Estimate the difference between the two lengths by rounding each length to the nearest hundred.

**Q8: **

Estimate by rounding each number to the nearest ten.

**Q9: **

Estimate by rounding each number to the nearest ten.

**Q10: **

Estimate by rounding each number to the tens place.