ERMS 7A FSA Grade 7 Math Review

Front

What is the median in a set of numbers?

Back

The median is the middle value when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

Front

How do you calculate the population living in urban areas?

Back

To find the population living in urban areas, multiply the total population by the fraction that lives in urban areas. For example, if 70% of 320 million live in urban areas, calculate 0.7 * 320 million = 224 million.

Front

What does a scale of 2 cm : 3 in mean in a blueprint?

Back

It means that every 2 centimeters on the blueprint represents 3 inches in actual size.

Front

How do you calculate simple interest?

Back

Simple interest can be calculated using the formula: Interest = Principal x Rate x Time. For example, if you invest $300 at 4% for 1 year, the interest is $300 x 0.04 x 1 = $12.

Front

What are integers?

Back

Integers are whole numbers that can be positive, negative, or zero. Examples include -3, -2, -1, 0, 1, 2, 3.

Front

What is the difference between whole numbers and integers?

Back

Whole numbers are non-negative integers, including zero (0, 1, 2, 3, ...), while integers include both positive and negative whole numbers (-3, -2, -1, 0, 1, 2, 3).

Front

How do you find the average (mean) of a set of numbers?

Back

To find the average, add all the numbers together and then divide by the total number of values.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other. For example, a ratio of 2:3 means for every 2 of one quantity, there are 3 of another.

Front

What is the formula for finding the area of a rectangle?

Back

The area of a rectangle is calculated by multiplying its length by its width. Area = Length x Width.

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. For example, 50% means 50 out of 100.