Question

Work these out mentally2/5 of 10 mm3/4 of 40 km 5/6 of $12

Answer 1

This can be solved by multiplying.

- 2/5 of 10 mm

$\frac{2}{5}\times10=\frac{20}{5}=4$

Answer: 4 mm

- 3/4 of 40 km

$\frac{3}{4}\times40=\frac{40\times3}{4}=\frac{120}{4}=30$

Answer: 30 km

- 5/6 of $12​

$\frac{5}{6}\times12=\frac{5\times12}{6}=\frac{60}{6}=10$

Answer: $10