Big Ideas - Ratios - Chapter 3, Lessons 1 & 2

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b' or a:b.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms of the ratio by their greatest common divisor (GCD).

Front

If the ratio of apples to oranges is 2:3, how many oranges are there if there are 4 apples?

Back

There are 6 oranges.

Front

What does it mean for two ratios to be equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities, meaning they can be simplified to the same fraction.

Front

How can you express the ratio of 3 to 5 in fraction form?

Back

The ratio of 3 to 5 can be expressed as the fraction 3/5.

Front

If you have a ratio of 4:1, how many parts are there in total?

Back

There are 5 parts in total (4 + 1 = 5).

Front

What is the ratio of 12 to 16 in simplest form?

Back

The simplest form of the ratio 12 to 16 is 3:4.

Front

If the ratio of boys to girls in a class is 2:5 and there are 10 boys, how many girls are there?

Back

There are 25 girls.

Front

What is the relationship between the ratios 6:9 and 2:3?

Back

The ratios 6:9 and 2:3 are equivalent because both can be simplified to the same fraction.

Front

If you have a total of 30 marbles and the ratio of red to blue marbles is 1:2, how many red marbles do you have?

Back

You have 10 red marbles.