Add and subtract mixed to 1000
On this page children practise combining addition and subtraction of three-digit numbers in a mixed practice set up to 1000. Start with the short method and the examples, then use the online practice or print a worksheet with answers.
How to solve this
- Mixed addition and subtraction to 1000 combines both operations — identify each operation before calculating.
- Work from left to right, applying each operation to the running total in order.
- Check by substituting the result back and tracing the chain: each step must be correct.
Examples
345 + 278 = ?
623
812 − 467 = ?
345
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.
- 337 + 342 = ___
- 247 + 296 = ___
- 368 − 246 = ___
- 312 + 251 = ___
- 282 + 478 = ___
- 343 − 233 = ___
- 358 + 204 = ___
- 147 + 456 = ___
Show answers
- 679
- 543
- 122
- 563
- 760
- 110
- 562
- 603