A ribbon is 3metres long.I need 8pieces of ribbon each 40cm long.How many centimetres shorter is the ribbon than the length I need?

3 meters = 300 cm

8 * 40 = 320 cm
need 20 cm more than I have

right

All math streak

20 is remaining

To find out how many centimeters shorter the ribbon is than the length you need, we first need to calculate the total length of ribbons you need and then subtract that from the length of the original ribbon.

Given:
Length of the original ribbon = 3 meters
Length of each required ribbon piece = 40 cm

Since the original ribbon is given in meters, we need to convert the length of each required ribbon piece to meters to have a consistent unit.

1 meter = 100 centimeters.
Therefore, the length of each ribbon piece in meters is 40 cm ÷ 100 = 0.4 meters.

Now, let's calculate the total length of ribbons you need:
8 pieces × 0.4 meters/piece = 3.2 meters.

Finally, subtract the total length of ribbons you need from the length of the original ribbon to find how many centimeters shorter the ribbon is:
Original ribbon length - Total length of ribbons needed = 3 meters - 3.2 meters.

Since the original ribbon is shorter than what you need, the result will be negative indicating how many centimeters shorter the ribbon is.

Math is bakwas

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