How do you convert 2 1/2 meters to centimeters?

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Answer 1 · 2016-10-22T07:47:56

#2.5 xx 100 = 250 cm#

The prefix 'cent' means 100. [Century is 100 years, #100c = $1#]

In #1 " metre " # there are #100 " centimetres"#

To change metres # rarr # cm, multiply by 100.

(move the decimal point 2 places to the right)

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

#2 1/2 m = 2.5m" "larr# write as a decimal

#2.5 xx 100 = 250 cm#

Answer 2 · 2016-10-27T10:11:23

#2 1/2" metres "= 250" centimetres"#

Known:#" "color(brown)( 1" metre "= 100" centimetres" )#

But we need #2 1/2 # metres

Multiply both sides by #2 1/2#

#color(brown)( color(blue)( 2 1/2xx)1" metre "= color(blue)(2 1/2xx)100" centimetres" )#

#2 1/2" metres "= 250" centimetres"#