think about the ratio
compare the ratio by dividing
Equivalent ratios have the same value. To determine whether two ratios are equivalent, write them as fractions. If the fractions are equal, the ratios are equivalent.
Write a ratio that represents the scale of the map in centimetres to kilometres and then think.
Set up a proportion and solve
A unit rate is a rate where the second amount is 1 unit.
solve the equation simply
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