Åk 6–9
 
English/Español
7.4 Decimals in the Numerator
Normally you can solve problems with decimals in the numerator by expansion (see 7.2) and simplification of fractions.

If we start with the number 0.4 ÷ 4.

Extend it by multiplying by 10.

0.4 ÷ 4 = = 4 ÷ 40

And the simply by dividing by 4.

4 ÷ 40 = = 1 ÷ 10 = 0.1

You can also imagine that if you have a 0.4 (4 dm) long string and cut it into 4 equal large pieces – how long with each piece be? The answer is 1 dm (0.1 m).