7th Grade Math STAAR Review

Front

What is the formula to calculate the percentage decrease in price?

Back

Percentage Decrease = ((Original Price - New Price) / Original Price) * 100

Front

What is the formula for the circumference of a circle?

Back

Circumference = π * Diameter

Front

What is the probability of an event?

Back

Probability = (Number of favorable outcomes) / (Total number of outcomes)

Front

What is simple interest?

Back

Simple Interest = Principal Amount * Rate * Time

Front

How do you find the expected value in a proportion?

Back

Expected Value = (Proportion of group) * (Total number in population)

Front

What is the value of π (Pi) approximately?

Back

π ≈ 3.14

Front

How do you calculate the interest charged on a loan after one year?

Back

Interest = Principal * Rate * 1

Front

What is the total number of pieces of fruit in the bag?

Back

Total = 3 apples + 2 oranges + 1 banana + 4 pears = 10 pieces of fruit

Front

How do you convert a fraction to a percentage?

Back

Fraction to Percentage = (Fraction * 100)%

Front

What is the formula for calculating the circumference of a circle if the radius is known?

Back

Circumference = 2 * π * Radius