Example 1 · level 1
2.5 × 9 = ?
Show solution
- 25 × 9 = 225.
- Put back 1 decimal place: 22.5.
Answer: 22.5
CLASS 7 MATHS · FRACTIONS AND DECIMALS
Multiply and divide decimals
Multiply as whole numbers, then count the total decimal places. To divide by a decimal, make the divisor a whole number first.
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Worked examples
Example 2 · level 2
46.5 ÷ 5 = ?
Show solution
- 46.5 ÷ 5.
- = 9.3.
Answer: 9.3
Example 3 · level 3
72.5 ÷ 2.5 = ?
Show solution
- 72.5 ÷ 2.5 = 725 ÷ 25.
- = 29.
Answer: 29