Addition - Grade 3 Math Worksheet 3 - 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

• 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.
• Find the missing number in sums such as 34 + __ = 71.
• Add three-digit numbers with regrouping in the ones and tens columns.

How to use this worksheet

Check the carried digit before checking the answer. Almost every wrong sum on a Grade 3 addition sheet is a carry written in the wrong column or forgotten entirely, not a fact your child does not know.

Sample questions from this worksheet

1. 350 + 150 =
2. 487 + 302 =

Frequently asked questions

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.

My child knows the facts but still gets sums wrong. Why?

Almost always column alignment or the carry. Squared paper, or one digit per box, fixes more Grade 3 addition errors than extra fact drill.

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.