Add hundreds
On this page children practise adding full hundreds by working with the hundreds digit only — for example 300 + 400 = 7 hundreds = 700. Start with the short method and the examples, then use the online practice or print a worksheet with answers.
How to solve this
- Adding hundreds works like adding ones, just with a zero at the end: 300 + 400 = 7 hundreds = 700.
- Focus on the hundreds digits only, then attach "00" to the result.
- Check that the ones and tens digits are both 0 in your answer, and the hundreds digit is the sum of the hundreds.
Examples
300 + 400 = ?
700
500 + 200 = ?
700
Practice problems with answers
Solve these problems on paper or out loud, then check the answer key. The online practice and the printable worksheet give a new set every time.
- 700 + 100 = ___
- 300 + 400 = ___
- 500 + 200 = ___
- 500 + 300 = ___
- 300 + 100 = ___
- 300 + 300 = ___
- 100 + 700 = ___
- 300 + 600 = ___
Show answers
- 800
- 700
- 700
- 800
- 400
- 600
- 800
- 900