Multiplication and Inverse Operations

Mr. Woolley introduces lesson five, focusing on using identity and inverse to write equivalent expressions. The video covers examples of temperature change, rewriting subtraction as adding the inverse, and collecting like terms. It also explores the concept of multiplicative inverse in expressions, providing students with practical examples and exercises to reinforce learning.

What is the afternoon temperature if it starts at -12°F and rises by 12°F?

• 12°F

• 0°F

• -12°F

• 24°F

What is the result of 2 minus 2 when rewritten as an addition problem?

• 4

• 0

• -4

• 2

How do you rewrite the expression 5 minus 5 using the concept of additive inverse?

• 5 + 5

• 5 + (-5)

• 5 - 5

• 5 - (-5)

What is the sum of 16 and 0?

• 32

• -16

• 16

• 0

What is the result of 2x plus the opposite of 2x?

• 2x

• 0

• -2x

• 4x

What is the result of multiplying a number by its multiplicative inverse?

• Undefined

• 1

• The number itself

• 0

What is the multiplicative inverse of 1/5?

• -5

• 1/5

• -1/5

• 5

What is the result of multiplying 1/3 by 3x?

• 1

• x

• 0

• 3x

What is the result of multiplying 1/4 by 4h?

• 1

• h

• 0

• 4h

What is the result of multiplying -6 by 1/6?

• 0

• 6

• -1

• 1