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

User Dkackman
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1 Answer

18 votes
18 votes

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

User Jgerman
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