What is expanded form for 2nd grade?

It's writing a number as the sum of its place values, like 358 = 300 + 50 + 8. These sheets practice both writing the expanded form and adding the parts back together.

Why does my child write 358 as 3 + 5 + 8?

They're reading the digits without their places yet. Regular practice expanding numbers, ideally next to base-ten blocks, fixes this quickly.

2nd grade expanded form

2nd grade expanded form worksheets

Expanded form worksheets ask 2nd graders to stretch a three-digit number into its place values (358 becomes 300 + 50 + 8), and to add the parts back into a single number.

Free printable PDF worksheet, aligned to Common Core 2.NBT.A.3, 4.NBT.A.2.

Each print is a different sheet with its own answer key. You don't need to sign up.

The kind of problems you'll get

Read each direction. Write the expanded form, number, or number name.

Write in expanded form. 24
Answer: 20 + 4
Write the number. 100 + 0 + 7
Answer: 107
Write in words. 429
Answer: four hundred twenty-nine

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 a 2nd grade sheet

Expanded form. Read each direction. Write the expanded form, number, or number name. 10 problems per page.

Every version prints on US Letter or A4, with its answer key after the problems.

How to teach this

Say the number in place value language before writing: 358 is "three hundreds, five tens, eight ones." Then write each value as its own number and read the sum back. If your child writes 3 + 5 + 8, build the number with base-ten blocks and count what each pile is really worth.

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 2nd grade expanded form

What is expanded form for 2nd grade?: It's writing a number as the sum of its place values, like 358 = 300 + 50 + 8. These sheets practice both writing the expanded form and adding the parts back together.
Why does my child write 358 as 3 + 5 + 8?: They're reading the digits without their places yet. Regular practice expanding numbers, ideally next to base-ten blocks, fixes this quickly.

Related worksheets

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Aligned to Common Core 2.NBT.A.3, 4.NBT.A.2. Reviewed by the One more sheet team. Content version 240, updated September 2026.

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