The Metric System Page 12

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Self Check A
A bread recipe calls for 600 g of flour. How many kilograms of flour would you need to
make 5 loaves?
Checking your Conversions
Sometimes it is a good idea to check your conversions using a second method. This
usually helps you catch any errors that you may make, such as using the wrong unit
fractions or moving the decimal point the wrong way.
Example
Problem A bottle contains 1.5 liters of a beverage. How many 250 mL
servings can be made from that bottle?
1.5 L ÷ 250 mL To answer the question, you
will need to divide 1.5 liters
by 250 milliliters. To do this,
convert both to the same
unit. You could convert
either measurement.
250 mL = ___ L
Convert 250 mL to liters
250
mL
1
L
= ___ L
1
1000
mL
250
L
= 0.25 L
1000
1
.5
L
1
.5
L
Now we can divide using the
=
1.5 L ÷ 250 mL =
converted measurement
2
50
mL
0
.
2
5
L
1
.5
L
=
6
0
.
2
5
L
Answer
The bottle holds 6 servings.
Having come up with the answer, you could also check your conversions using the
quicker “move the decimal” method, shown below.
4.68

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