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

`(2)/(5)*10=(20)/(5)=4`

Answer: 4 mm

- 3/4 of 40 km

`(3)/(4)*40=(40*3)/(4)=(120)/(4)=30`

Answer: 30 km

- 5/6 of $12​

`(5)/(6)*12=(5*12)/(6)=(60)/(6)=10`

Answer: $10