3rd grade expanded form worksheets

The kind of problems you'll get

Every print pulls a fresh set of problems at this level, so a make-up test or a second sibling never gets the same sheet.

What's on each sheet

• Fluency. Write the number in expanded form, or add the parts back together. 10 questions per page.

Every version prints on US Letter or A4, with its answer key on the last page.

How to teach this

Watch the zeros. Read 4,000 + 90 + 6 aloud and ask "which place do you not hear?" The missing hundreds is the trap. Going the other way, have your child draw a short line for each place first, then fill the digits in.

Watch for: Kids write 358 as 3 + 5 + 8. Each digit stands for its place value, so it's 300 + 50 + 8. Kids skip an empty place and read 4,000 + 90 + 6 as 496. The missing hundreds still needs a zero, so it's 4,096.

Common questions about expanded form

How is 3rd grade expanded form different from 2nd?

Numbers grow to four digits and include internal zeros, like 4,096 = 4,000 + 90 + 6. Those zeros cause most of the mistakes, so the sheets include them on purpose.

Do the sheets go both directions?

Yes. Some problems expand a number into parts, others give the parts and ask for the number, so your child sees place value both ways.

Related worksheets

• 2nd grade expanded form A step easier, same skill
• 3rd grade place value to thousands Same grade, nearby skill
• 3rd grade rounding to the nearest 10 and 100 Same grade, nearby skill
• Expanded form, all grades The full progression
• All 3rd grade math worksheets Every skill at this level
• All 3rd grade worksheets Everything at this level