Spiral Review Week 18

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed. The acronym PEMDAS helps remember the order: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by performing the operations indicated in the expression.

Front

What is the formula for the area of a rectangle?

Back

The area of a rectangle is calculated using the formula: Area = Length × Width.

Front

How do you find the perimeter of a rectangle?

Back

The perimeter of a rectangle is found by adding together the lengths of all four sides, or using the formula: Perimeter = 2 × (Length + Width).

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents a number in mathematical expressions or equations.

Front

What does it mean to divide a number?

Back

Dividing a number means to split it into equal parts. For example, 12 ÷ 3 means to divide 12 into 3 equal parts, which equals 4.

Front

What is an inequality?

Back

An inequality is a mathematical statement that compares two expressions and shows that one is greater than, less than, or not equal to the other.

Front

What is the significance of parentheses in mathematical expressions?

Back

Parentheses indicate which operations should be performed first in an expression, helping to clarify the order of calculations.

Front

How do you solve for a variable in an equation?

Back

To solve for a variable, you isolate the variable on one side of the equation by performing inverse operations on both sides.

Front

What is the meaning of 'average' in mathematics?

Back

The average, or mean, is calculated by adding a set of numbers and then dividing by the count of those numbers.