Number houses (mixed)
Number houses (mixed) helps children practise decomposing two-digit numbers into all pairs of addends, including combinations that cross a ten. Read the short guide and look through the examples before choosing online practice or a printable worksheet.
How to solve this
- A mixed number house uses both addition and subtraction to link the roof with each pair of floors.
- Read the operation sign above or beside each floor to know whether to add or subtract.
- Check that every floor satisfies the equation with the roof using the operation shown.
Examples
Number house 70: 30 + __
40
Number house 56: 20 + __
36