Expanded form worksheets — break numbers into place values

Writing 347 as 300 + 40 + 7 shows what each digit is really worth, and it is the base of mental calculation and column methods. These sheets alternate two tasks: break a number into its place values, and build the number back from a sum. Numbers go from 2 to 4 digits, and every fourth number contains a zero — exactly where children slip, writing 4 + 0 + 5 instead of 400 + 5. The answer key gives every expansion.

🧮 Best for ages 6–10

How to get the most from these sheets

• Read the number aloud: “three hundred forty-seven” already contains the parts.
• Use a place-value table (thousands, hundreds, tens, ones) for the first sheets.
• A zero digit makes no part: 405 = 400 + 5.
• Check by adding the parts back together.

Frequently asked questions