Ratios & Proportions (6th, 7th, 8th)

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, often expressed as 'a to b' or a:b.

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

You can solve a proportion by cross-multiplying the terms.

Front

What does it mean to isolate a variable?

Back

To isolate a variable means to manipulate an equation so that the variable is on one side and all other terms are on the other side.

Front

What is cross multiplication?

Back

Cross multiplication is a method used to solve proportions by multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If 8/20 = X/15, what is X?

Back

X = 6.

Front

If 10/W = 5/9, what is W?

Back

W = 18.

Front

How do you find the value of X in the equation 20X = 120?

Back

Divide both sides by 20.

Front

What operation is used to solve the equation 10N = 100?

Back

Divide both sides by 10.

Front

What is the first step in solving the equation 3X + 5 = 20?

Back

Subtract 5 from both sides.