The Metric System Page 11
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131 meter + 35 cm
Convert the 1 meter to
100 cm + 35 cm
centimeters, and combine with
135 cm
the additional 35 centimeters.
200 cm – 135 cm
Subtract the cut length from the
65 cm
original board length.
Answer
There is 65 cm of board left.
An example with a different context, but still requiring conversions, is shown below.
Example
Problem A faucet drips 10 ml every minute. How much water will be wasted in a
week?
10
60 minute 24 hours 7 days
Start by calculating how
ml
•
•
•
much water will be used in
1 minute
1 hour
1 day
1 week
a week using the factor
label method to convert
the time units.
Cancel, multiply and solve.
7 days
10
ml
60 minute
24 hours
•
•
•
1 week
1 minute
1 hour
1 day
10 60 24 7
ml
1 1 1 1 week
To give a more useable
100800
ml
answer, convert this into
1 week
liters.
100800 ml
1 L
Cancel, multiply and solve.
1 week
1000 ml
100800 ml
1 L
1 week
1000 ml
100800 L
L
100.8
=
1000 week
week
Answer
The faucet wastes about 100.8 liters each week.
This problem asked for the difference between two quantities. The easiest way to find
this is to convert one quantity so that both quantities are measured in the same unit, and
then subtract one from the other.
4.67
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