Rounding to the nearest 10 and 100 worksheets

Rounding helps children estimate, which is how they check whether an answer makes sense. In 3rd grade they round to the nearest 10 and 100.

This 20-page pack starts with rounding to 10 on a number line, then without one, then rounding to 100, tricky halfway numbers, and estimating sums and differences. The answer key gives every rounded number.

The Halloween single page below has 30 numbers to round.

What you get

The pack is a US Letter PDF (A4 works with fit to page): 20 practice pages, a 20-page answer key, a how-to page with tips for parents and teachers, a color-in progress tracker and a cover page. Download it right after checkout and print as many copies as you need for your family or one classroom.

Tips

• Find the two tens a number sits between.
• Look at the digit to the right: 5 or more rounds up.
• Use rounding to estimate before adding.