You multiply two rational numbers by multiplying numerators and denominators with each other. So, you have

A rational number is a fraction where both numerator and denominator are integers. Since the product of two integers is an integer, the result fraction is also a rational number, because both
and
are integers.
The estimate of the sum of 202 and 57 is 260. You add the numbers together and than round up.
Step-by-step explanation:
13.5 is the difference of the length of the roads