Addition - Grade 3 Math Worksheet 1 - Free Printable

Download this free printable Addition worksheet for Grade 3 Math. Perfect for practice, homework, and classroom use.

Grade 3 Math practice

This printable Addition worksheet is part of the free WizKidsHub Grade 3 Math collection. Print it at home or in the classroom for extra practice.

What this worksheet teaches

• Add three numbers in one sum by looking for pairs that make ten first.
• Estimate a sum by rounding to the nearest ten or hundred, then check the exact answer against it.
• Solve one- and two-step word problems and write the answer with its unit.
• Use the fact that addition can be done in any order to check a sum a second way.

How to use this worksheet

Have your child estimate before calculating on the larger sums - 298 + 405 is 'about 700'. An answer of 1,203 then looks obviously wrong to them without you saying anything.

Sample questions from this worksheet

1. 800 + 150 =
2. 725 + 275 =

Frequently asked questions

Should my child still use fingers or counters?

Occasionally is fine, but by Grade 3 the aim is recall of facts to twenty plus a written method for larger numbers. If counters are used for every single fact, short daily fact practice will help more than this sheet.

Is mental addition or the column method expected?

Both. Small sums are meant to be mental, while three-digit sums with regrouping are meant to be written in columns.

Why does the worksheet ask for estimates?

Because estimating is the self-checking habit Grade 3 syllabuses introduce here - it catches answers that are wildly out before the answer key does.