Question

A metal rod will be cut into pieces that are each 1/30 m long. The rod is 2/5 m long. How many pieces will be made from the rod

Answer 1

12 pieces

Explanation:

Simply divide the length of the rod by the length of each piece that's going to be cut off of it. Normally you'd use centimeters, or at least decimals and not fractions, but they seem to like fractions, so:

2/5 ÷ 1/30 is the same as:

2/5 x 30/1 Do you remember that? How when you divide by a fraction you get to flip it and multiply?

So: 60/5 = 12 pieces

Check it:

12 pieces times 1/30m each = 12/30 = 6/15 = 2/5m. So our answer checks out.