Question

A roll of ribbon was 9 meters long. Kevin cut 8 pieces of ribbon, each of length 0.8 meter, to tie some presents. He then cut the remaining ribbon into some pieces, each of length 0.4 meter.

a) How many pieces of ribbon, each 0.4 meter in length, did Kevin have?
b.) What was the length of ribbon left over?

(Please explain how you got your answer) (Please help!)

Answer 1

Answer:

6 pieces

0.2 left over

Step-by-step explanation:

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

The .5 is half of 0.4 so the left over is 0.2

(the original poster doesn’t need this anymore but if anyone else does, here ya go)

Answer 2

a. The number of pieces that Kelvin can cut if each piece is 0.4 meter long is 6 pieces.

b. The length of ribbon leftover is 0.2 meters.

The roll of the ribbon is 9 meters long. If he cuts  8 pieces and each piece is 0.8 meter long, the total length of the 8 pieces can be determined by multiplying the pieces cut by the length of each piece.

Total length cut = 0.8 meter x 8 = 6.4 meters

The total length that remains after he cuts the 8 pieces can be determined by subtracting the total length cut from the length oft the ribbon.

Length left = 9 meters - 6.4 meters = 2.6 meters

The length of each piece Kelvin would have if each piece is 0.4 meter long can be determined by dividing the length left by 0.4.

Number of pieces = 2.6 / 0.4 = 6.5 pieces

Thus he can cut the ribbon into 6 pieces.

The length of the ribbon leftover = 2.6 meters - (6 x 0.4)

2.6 - 2.4 = 0.2 meters

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