Question

A roll of ribbon was 9 meters long. Kevin cut 8 pieces of rib ion, each 0.8 metre long, to tie some presents. He then cut the remaining ribbon into some pieces, each 0.4 metre long. a) How many pieces of ribbon, each 0.4 metre in length, did Kevin have ?b) What was the length of ribbon left over ?

Answer 1



How many pieces of ribbon, each:

Explanation:

(a) Start by multiplying 8 by 0.8 to see the amount of ribbon used for those pieces

8 × 0.8 = 6.4

Then subtract 6.4 from 9 which should give you 2.6

9 - 6.4 = 2.6

Then divide 2.6 by 0.4 which gives you 6.5

2.6 ÷ 0.4 = 6.5

So you have 6 pieces

(b) The length of ribbon leftover:

`\begin{gathered} 6.5-6=0.5 \\ 0.5\text{ x 0.4 = 0.2} \end{gathered}`

The 0.5 is half of 0.4 so the leftover is 0.2