Substitution

Front

What is substitution in mathematics?

Back

Substitution is the process of replacing a variable with a number or another expression to evaluate an equation or expression.

Front

Solve 14 - cd when c = 2 and d = 7.

Back

0

Front

If a = 6 and b = 7, find the value of 15 - a - b.

Back

2

Front

Solve 8a + (a - b) when a = 7 and b = 4.

Back

59

Front

If y = 4, find the value of 3y + 5.

Back

17

Front

What is the first step in solving 12 ÷ 3 x 4?

Back

12 ÷ 3

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with their respective numbers.

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents an unknown value in an expression or equation.

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: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

If x = 3, what is the value of 2x + 4?

Back

10