Proportions and Equivalent Ratios

Front

What is a proportion?

Back

A pair of equivalent ratios

Front

How can we find an unknown value in a proportion?

Back

By cross-multiplying

Front

What is the missing number in the proportion: 3 books per 5 days = 9 books per ? days

Back

15

Front

In the example with the map of Hawaii, what is the unknown distance from Mona Loa to Hilo?

Back

36 miles

Front

4 pizzas per 8 days = ? pizzas per 16 days

Back

4

Front

What happens to a number when it is multiplied by 1?

Back

It stays the same

Front

Equivalent ratio for 2 books per 4 days? Options: 1 book per 2 days, 3 books per 6 days, 4 books per 8 days, 5 books per 10 days

Back

5 books per 10 days

Front

6 miles per 12 hours = 3 miles per ? hours

Back

2

Front

What is the missing number in the proportion: 7 pencils per 14 students = ? pencils per 28 students

Back

21