Michael has a tug-of-war rope that is 15 meters long. How many centimeters long is the rope?

2 Answers
EZ as pi
Sep 18, 2016

15 m = 15 xx 100 = 1500cm

Explanation:

"cent" refers to 100. (century = 100 years, 100c = $1)
A 'centenarian' reaches 100 years old.

In the SI or metric system, there are 100 centimeters in 1 metre.

If you change a number to a smaller unit, the number gets bigger.

15 m = 15 xx 100 = 1500cm

Tony B
Sep 20, 2016

color(green)("15 metres = 1500 centimetres")

Explanation:

It takes 100 centimetres to make 1 metres

color(brown)("Expressing this as a ration we have:")

("centimetres")/("metres") ->100/1 -=("? centimetres")/15

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
color(brown)("Multiply by 1 and you do not change the value. However, 1 comes in")color(brown)("many forms.")

("centimetres")/("metres") ->(100/1color(magenta)(xx1)) -=("? centimetres")/15

("centimetres")/("metres") ->(100/1color(magenta)(xx15/15)) =("? centimetres")/15=1500/15

color(green)("So 15 metres = 1500 centimetres")

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