Addition - Grade 3 Math Worksheet 5 - 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

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

How to use this worksheet

For word problems, ask them to say what the answer will be about - rupees, books, minutes - before they touch the numbers. Most lost marks here come from solving correctly and labelling the wrong thing.

Sample questions from this worksheet

1. 245 + 120 =
2. 320 + 410 =

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.