Add hundreds and tens
On this page children practise adding three-digit numbers that contain only hundreds and tens — no ones digits involved. Start with the short method and the examples, then use the online practice or print a worksheet with answers.
How to solve this
- When adding numbers made of hundreds and tens (no ones), add hundreds to hundreds and tens to tens.
- Watch for regrouping: if tens sum to 100 or more, carry 1 to the hundreds column.
- Check by expanding: verify each column separately, then recombine.
Examples
340 + 250 = ?
590
470 + 310 = ?
780
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.
- 464 + 153 = ___
- 250 + 497 = ___
- 444 + 339 = ___
- 282 + 438 = ___
- 462 + 203 = ___
- 424 + 317 = ___
- 420 + 489 = ___
- 374 + 487 = ___
Show answers
- 617
- 747
- 783
- 720
- 665
- 741
- 909
- 861