MATH COMP 3

Question 1

fractions

Answer 1

find common denominator to add or subtract fractions

Question 2

to multiply fractions

Answer 2

multiply straight across no common denominator is needed

Question 3

to divide fractions

Answer 3

multiply by the common denominator

Question 4

to turn improper fractions into mixed numbers

Answer 4

divide the numerator by denominator and put remainder over denominator
42/5 = 8

Question 5

to turn mixed numbers into improper fractions

Answer 5

multiply the denominator by the whole number and add the numerator
8 x 5 = 40 + 2 = 42

Question 6

proportions

Answer 6

triangles with two measurements 5, 8 10, x
5/8 = 10/x cross multiply
5x = 80… 80/5 = 16