Multiply as whole numbers, then place the point by counting decimal places
Set the two tenths with − and +. Watch the shaded overlap in the grid — that is the answer.
First decimal
Second decimal
The grid is 1 whole. Blue columns = 0.3, red rows = 0.4. The purple overlap = 0.3 × 0.4.
Place counting
0.3 (1 dp) × 0.4 (1 dp) → 12 → 2 dp → 0.12
Product
0.12
🚀 Keep practising