Unit 1 Review 7th grade

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It expresses how much of one quantity corresponds to one unit of another quantity.

Front

How do you calculate the area of a circle?

Back

Area = π × r², where r is the radius of the circle.

Front

What is the scale in a scale drawing?

Back

The scale is the ratio of the dimensions in the drawing to the actual dimensions. For example, a scale of 2 ft to 1 in means 2 feet in reality is represented as 1 inch in the drawing.

Front

If the cost of 4 gallons of gasoline is $11.56, what is the cost per gallon?

Back

Cost per gallon = Total cost / Number of gallons = $11.56 / 4 = $2.89.

Front

What is the relationship between cans of soda and ounces of pineapple juice in Jane's punch recipe?

Back

The equation is 16s = j, where s is the number of cans of soda and j is the ounces of pineapple juice.

Front

What does it mean if a ratio is not a unit rate?

Back

It means that the ratio does not simplify to a comparison of one quantity per one unit of another quantity.

Front

How do you convert feet to inches in a scale drawing?

Back

Multiply the number of feet by 12 to convert to inches.

Front

What is the diameter of a circle?

Back

The diameter is the distance across the circle through its center, equal to twice the radius.

Front

How do you round a number to the hundredths place?

Back

Look at the third decimal place; if it's 5 or more, round up the second decimal place by one.

Front

What is the formula for finding the unit rate from a ratio?

Back

Divide the first quantity by the second quantity to find the unit rate.