Understanding Zero in Equations

The video tutorial presents a mathematical challenge inspired by Danica McKellar's Twitter feed. It involves solving equations with emoji symbols representing different values. The tutorial starts by determining the value of smiley faces, followed by winky faces, and then heart eyes. Each step involves forming equations and solving for unknowns. The final part of the tutorial addresses a new variable, kissy faces, and emphasizes the importance of the order of operations in solving equations. The tutorial concludes with the solution to the challenge.

What is the total value of three smiley faces?

• 6

• 3

• 0

• 9

If each smiley face is worth zero, what is the equation for three smiley faces?

• S + S + S = 3

• S = 0

• 3S = 3

• 3S = 0

What is the value of each winky face if two winky faces total 20?

• 15

• 20

• 10

• 5

How do you solve for the value of each winky face?

• Divide by 2

• Subtract 10

• Add 10

• Multiply by 2

What is the equation for two winky faces if they total 20?

• 2W = 20

• W + W = 10

• W = 20

• 2W = 10

What is the value of each heart eye if two heart eyes and a winky face total 18?

• 2

• 4

• 6

• 8

How do you solve for the value of each heart eye?

• Divide by 2

• Multiply by 2

• Subtract 10

• Add 10

What is the equation for two heart eyes if they total 8?

• 2H = 8

• H + H = 4

• 2H = 4

• H = 8

What is the value of a heart eye if a winky face is worth 10?

• 6

• 8

• 2

• 4

What operation is performed first according to the order of operations?

• Addition

• Division

• Multiplication

• Subtraction