7th Grade Math STAAR Review

Front

What is the formula to calculate the circumference of a circle?

Back

Circumference = π × diameter

Front

How do you calculate the percentage decrease in price?

Back

Percentage decrease = (original price - new price) / original price × 100

Front

What is simple interest and how is it calculated?

Back

Simple interest = principal × rate × time

Front

What equation can be used to find the number of additional quarters needed if you have a total amount and a current amount?

Back

Total amount = current amount + (value of each quarter × number of quarters)

Front

What is the probability of selecting two specific fruits from a bag without replacement?

Back

Probability = (number of favorable outcomes / total outcomes) × (number of favorable outcomes after first selection / total outcomes after first selection)

Front

What is the value of π (pi) approximately?

Back

π ≈ 3.14

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 find the total number of outcomes when selecting items?

Back

Total outcomes = number of items in the first selection × number of items in the second selection (if applicable)

Front

What is the relationship between radius and diameter?

Back

Diameter = 2 × radius

Front

How do you convert a fraction to a percentage?

Back

Percentage = (fraction × 100)%