What this worksheet covers
Expanded form shows a number as the sum of the values of its digits. On this sheet it works in reverse: the parts are given, and the student adds them to find the number. Some problems contain a zero place, such as 500 + 7, which asks students to see that the tens place is empty and the number is 507, not 57.
Who it is for
Second and third grade, under Common Core 2.NBT.A.3, which asks students to read and write numbers to 1,000 using base-ten numerals, number names, and expanded form. Use it after the place value sheet.
Adding hundreds, tens and ones to write a number · grades 2 and 3
A worked example
Take 700 + 90 + 2. Seven hundreds, nine tens, two ones: 792. Now take 300 + 7. There are no tens, so a zero holds the place and the number is 307. Ask students what would go wrong if they wrote 37.
Mistakes to watch for
- Dropping the zero placeholder and writing 37 for 300 + 7. Use a place-value chart to show the empty tens column.
- Adding the digits instead of the values, giving 4 + 3 + 7 = 14. Read the parts aloud with their names.
Make it your own
This sheet is one setting of the math worksheet generator. Open it there to change the skill, the range of numbers or the heading, or to mix several skills on one sheet.