Add hundreds and tens
Add hundreds and tens helps children practise adding three-digit numbers that contain only hundreds and tens — no ones digits involved. Read the short guide and look through the examples before choosing online practice or a printable worksheet.
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