Addition Subtraction With Missing Variables

How do you solve one step equations

• by guessing the answer

• by getting one side equal to 0

• by doing the same thing to both sides of the equal sign

• by doing the same thing to both sides of the variable

What is a variable?

• A number equal to 1

• an unknown number

• a number that is shy

Which equation represents the following scenario?
Edger jogs for 20 minutes. He stretches and then jogs some more. In total, he jogs for 35 minutes. Let j = the number of miles he jogs after stretching.

• 35 + 20 = j
• 20 + j = 35
• 20j = 35
• j - 20 = 35

Which of the following is used to solve single step equations mathematically?

• substitution
• inverse operations
• frequency
• data analysis

Use mental math to solve. 15 = x + 6

• x = 9
• x = 15
• x = 6
• x = 12

Use mental math to solve. 13 = x - 7

• x = 13
• x = 7
• x = 20
• x = 30

What is the inverse operation needed to solve for p?
765 = p - 254

• subtraction
• addition
• multiplication
• division

x + 12 = 20

• x = 32
• x = -32
• x = 8
• x = -8

Challenge Question:
12 + y + 17 = 59

• 29
• 88
• 30
• 42