9/8 Math 7 Lab: Additive Inverse & Operations with Integers

Additive Inverses

Multiple Choice

The additive inverse of 9 is?

• 0

• 1

• -9

• -10

Multiple Choice

( ) + 16=0

• -15

• -16

• 0

• 16

Multiple Choice

What is the OPPOSITE of -5?

• -5
• 0
• 5
• -0

Multiple Choice

33 + (-33)=

• 33

• 0

• 66

• 10

When subtracting integers, we move to the left on the number line.

Subtraction

When adding integers, we move to the right on the number line​.

Addition

​Addition and Subtraction with Integers

Integer chips can help find zero pairs

1 + (- 1) = 0​

​Zero Pairs & Integer Chips

Multiple Choice

What is the answer to the problem in the picture?

(Blue = positive, red = negative)

• 4

• -6

• 2

• -2

Multiple Choice

What expression correctly represents the picture?

• -5 - 2

• 5 + - 2

• -5 + 2

• 5 + 2

- + becomes -

​

​

- - becomes +​

​

+ - becomes -

​

​

+ + becomes +​

​Signs when Adding/Subtracting Integers

Multiple Choice

When adding positive numbers on a number line, you move to the ____________.

• Right
• Left

Multiple Choice

-4 + (-3) = ?

• 7
• 1
• -1
• -7

Multiple Choice

$$-9+\left(-5\right)$$  

• $$-14$$  

• $$14$$  

• $$-4$$  

Multiple Choice

$$25-\left(-9\right)=$$  

• 34

• 16

• 14

• 36

Multiple Choice

When you are subtracting using a number line, you want to jump to the.......

• right

• left

• up

• down

Multiple Choice

-5 - (-17) ... Which addition sentence represents the same problem?

• -5 + 17

• -5 + (-17)

• 5 + (-17)

• 5 + 17

Multiple Choice

-22 + (-24) 

• 46
• -22
• 22
• -46

​TODAY'S TOPIC: Multiplication and Division with Integers

​Multiplying Integers Rules

​Dividing Integers Rules

Multiple Choice

Is the product
–8 • (–3) positive or negative?

• negative
• positive
• both
• neither

Multiple Choice

A negative number multiplied by a positive number will equal ________.
(-) x (+) = ???

• 0
• a positive number.  (+)
• a negative number.  (-)
• a fraction.

Multiple Choice

$$5\times\left(-7\right)$$  

• Positive

• Negative

Multiple Choice

(-25) ÷ (-5)

• 5
• -5
• -20
• -30

Multiple Choice

A negative number multiplied by another negative number will equal ________.
(-) x (-) = ???

• 0
• a positive number.  (+)
• a negative number.  (-)
• a fraction.

Multiple Choice

• -4
• -6
• 4
• 6

Multiple Choice

$$\left(-5\right)\times\left(-7\right)$$  

• Positive

• Negative

Multiple Choice

Multiply
(5) • (–9) • (–2)

• 90
• -45
• -90
• 47

Multiple Choice

Are the two expressions equivalent? 
   -5(3) and 5(-3)

• yes
• no