7th Grade Math Review

Front

What is the formula to calculate percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) * 100

Front

What is the distance around a circle called?

Back

Circumference

Front

If a circle has a radius of 3 ft, what is the diameter?

Back

Diameter = 2 * Radius = 6 ft

Front

What is the probability of picking a red marble from a jar containing 2 pink, 6 red, and 4 blue marbles?

Back

Probability of red = Number of red marbles / Total marbles = 6/12 = 1/2

Front

What is the probability of picking a blue or red marble from the same jar?

Back

Probability of blue or red = (Number of red + Number of blue) / Total marbles = (6 + 4) / 12 = 10/12 = 5/6

Front

What does it mean if an event is described as 'impossible'?

Back

An impossible event cannot happen; its probability is 0.

Front

What does it mean if an event is described as 'certain'?

Back

A certain event will definitely happen; its probability is 1.

Front

What is the definition of a number cube in probability?

Back

A number cube is a six-sided die, with each side showing a different number from 1 to 6.

Front

If you roll a number cube, what is the probability of rolling a number greater than 4?

Back

Probability = Number of favorable outcomes / Total outcomes = 2/6 = 1/3.

Front

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

Back

Area = Length * Width.