Example 3. Two colours of slabs

The patio needs 240 slabs. Liz wants half (½) of these to be sandstone and half to be terracotta.

To calculate half of any number, share it by 2.

Set out the sum like this:

Patio area | Shaped slabs | Two colours of slabs | Four colours of slabs |
Bird tally | Shaped planters | Garden lights | Wiring problems