Solving One-Step Equations

Solving One-Step Equations

2021-2022

Expression

• mathematical phrase with a combination of numbers, variables, and operations

• does not have an equals sign

Multiple Choice

An expression has an equals sign.

• True

• False

Equation

• a mathematical sentence stating two expressions are equivalent

• has an equals sign

Multiple Choice

Which of the following has an equals sign?

• Equation

• Expression

Solving equations

• use inverse operations to isolate the variable

• keep the equation balanced by performing the same operation on both sides of the equals sign

Multiple Choice

Which of the following inverse operations is incorrect?

• inverse of addition is subtraction

• inverse of multiplication is division

• inverse of division is squaring

• inverse of multiplication is division

3 = z + 6

• subtract 6 from both sides

• z = -3

r - ( -2 ) = -15

• rewrite as addition

• r + 2 = -15

• subtract 2 from both sides

• r = -17

Multiple Choice

How do we solve f - 12 = -4

• add -12 to both sides

• subtract 12 from both sides

• add 12 to both sides

• add 4 to both sides

-16 = -4p

• divide both sides by -4

• p = 4

k/3 = -30

• multiply both sides by 3

• k = -90

Multiple Choice

How do we solve -2k = -100?

• multiply by 2 on both sides

• divide by 2 on both sides

• add 100 to both sides

• divide by -2 on both sides

Multiple Choice

7 + g = 11

• g = 4

• g = -4

• g = 18

• g = -18

Multiple Choice

z/4 = -8

• z = -32

• z = 32

• z = 2

• z = -2

Poll

How do you feel about solving one-step equations?

• 1 - I'm totally lost and need some help.

• 2 - I am starting to get this!

• 3 - I understand what to do I just want more practice.

• 4 - I've got this! Let me do my work.

• 5 - I understand it so well I could help someone else if they need it!