Multiplying decimals
You learn to do a whole number times a decimal, like 4 × 0.5.
How to work it out
- Remove the decimal point: 0.25 is 25 hundredths.
- Multiply with whole numbers.
- Put the decimal point back: 100 hundredths is 1.
3 × 0.25
- Take the decimal point away: 0.25 is 25 hundredths.
- Work it out: 3 × 25 = 75.
- Put the decimal point back: 75 hundredths is 0.75.
More examples
4 × 0.5
- Take the decimal point away: 0.5 is 50 hundredths.
- Work it out: 4 × 50 = 200.
- Put the decimal point back: 200 hundredths is 2.
5 × 0.2
- Take the decimal point away: 0.2 is 20 hundredths.
- Work it out: 5 × 20 = 100.
- Put the decimal point back: 100 hundredths is 1.