Intro to Proportional Thinking FSMS

Front

What is a Ratio?

Back

A ratio is a comparison of two quantities.

Front

What is a Proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How can a ratio be written?

Back

A ratio can be written in three ways: 3:4, 3/4, or 3 to 4.

Front

What does it mean if two ratios form a proportion?

Back

It means that the two ratios are equivalent.

Front

If Hunter buys 36 baseball cards for $18, how many baseball cards can Troy buy if he has $9?

Back

Troy can buy 18 baseball cards.

Front

What is the ratio of green dots to orange dots if there are 3 green dots and 5 orange dots?

Back

The ratio of green dots to orange dots is 3:5.

Front

Which of the following is NOT a way to write a ratio: 3=4, 3:4, 3/4, or 3 to 4?

Back

3=4 is NOT a way to write a ratio.

Front

What is the first step in determining if two ratios form a proportion?

Back

The first step is to cross-multiply the two ratios.

Front

If the ratio of boys to girls in a class is 2:3, how many boys are there if there are 15 girls?

Back

There are 10 boys.

Front

What is the term for a ratio that compares a quantity to one unit of another quantity?

Back

This is called a rate.