Evaluating Expressions using Substitution

Front

What is substitution in evaluating expressions?

Back

Substitution is the process of replacing a variable in an expression with a specific value to calculate the expression's value.

Front

Evaluate the expression: a + b when a = 3 and b = 4.

Back

7

Front

What is the value of the expression 5(y + x) when x = 5 and y = 4?

Back

45

Front

Evaluate the expression 2r + 1 when r = 3.

Back

7

Front

What is the commutative property of addition?

Back

The commutative property states that changing the order of the numbers in an addition problem does not change the sum. For example, 9 + 5 = 5 + 9.

Front

Back

5

Front

What is the value of the expression 5 + 9?

Back

14

Front

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

Back

18

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 values.

Front

Evaluate the expression 4a - 2b when a = 2 and b = 3.

Back

2