Multiply, Divide, Add, Subtract Integers

Add and Subtracting Numbers

Keep

Change

Change

Only do KCC when we have a subtraction sign. ​

Subject | Subject

Some text here about the topic of discussion

Multiple Choice

When you add integers with the same sign, what do you do? 

• (+) and keep the sign

• (-) and keep the sign of the larger

• (x) and keep the sign
• (-) and keep the sign of the smaller

Multiple Choice

(-10) + (-7)

• -17
• 17
• 3
• -3

Multiple Choice

What do you do when you are adding integers with different signs? 

• (-) and keep sign of smaller number
• (-) and keep sign of larger number
• (+) and keep sign of smaller number number
• (+) and keep sign of larger number 

Multiple Choice

Bob lost 5 points on page one of his math test and he lost 9 points on page two of his math test.  Which equation best describes Bob progress on his math test?

• 5 + 9 = 14
• -5 + -9 = -4
• -5 + -9 = -14
• 5 + -9 = -4

Open Ended

What is one question you'd like answered about decimals as we begin today?

Rules for adding and subtracting decimals

• if the signs are the same, just add

• if the signs are different, subtract and take the sign of the larger absolute value

• when subtracting a negative, just add the opposite

Multiple Choice

What was the first rule?

• When subtracting a negative, add the opposite

• If the signs are different, subtract and take the sign of the larger absolute value

• When the signs are the same, just add

when the signs are the same

Just add the two numbers together
For example -4.3 + -8.2 = - 12.5
or -2.7 - 9.1 = - 11.8

-6 + -4 = ______

-8 - 5 = ______

-5 + 3 = ______

2 + -8 = ______

5 - 2 = ______

6 - 8 = ______

Let's Practice!

Please do not use a calculator. Try your best without one. It's okay to get things wrong.

Open Ended

(−12) + 7

Open Ended

(−10) + (−7)

Open Ended

(−6) + 12

Open Ended

(−30) + 10

​-4 - 5

​-4 - (-5)

SUBTRACTING Integers on a Number Line

Modeling on a Number Line

-5 - (-3)

​Change to an Addition Problem

Keep - Change - Change​

Fill in the Blanks

Fill in the Blanks

Multiple Select

Which expressions match the problem shown on the number line?

• 6 + -8

• 6 - 8

• 6 - 3

• 6 + -3

• 6 - -8

I

N

T

E

G

E

R​

​R

U

L

E

S​

Multiple Choice

(-9)(-8)

• -72
• 72
• 81
• -81

Multiple Choice

4(-20)

• 80
• -80
• 24
• -24

Multiple Choice

Which expression DOES NOT have a product of −18?

• −2 ∗ −9
• −6 ∗ 3
• −3 ∗ 6
• −9 ∗ 2

Multiple Choice

44/-4=

• 11
• -8
• -11
• -1/11

Numerator x Numerator

Denominator x Denominator ​

​

Multiply Straight Across!!

DO NOT FIND COMMON DENOMINATOR ​

​

​Turn division problem into multiplication!!

Multiple Choice

$$\frac{5}{3}\times-\frac{13}{7}$$  

• $$3\ \frac{3}{21}$$  

• $$-\frac{4}{21}$$  

• $$-3\ \frac{3}{21}$$  

• $$-5\ \frac{83}{210}$$  

Multiple Choice

$$\frac{5}{6}\div\frac{3}{10}$$  

• $$2\ \frac{7}{9}$$  

• $$-\frac{1}{2}$$  

• $$\frac{1}{4}$$  

• $$5\ \frac{1}{8}$$  

Multiple Select

Select all the expressions that are equivalent to $$7^2$$ .

• $$14$$  

• $$7\times7$$  

• $$7\times2$$  

• $$49$$  

• $$7+2$$  

Multiple Select

Select all the expressions that are equivalent to $$-10$$  .

• $$2+\left(-8\right)$$  

• $$-2+8$$  

• $$-2-8$$  

• $$5+5$$  

• $$-5+\left(-5\right)$$  

Multiple Select

Select all the expressions that are equivalent to $$-5-\left(-4\right)$$  .

• $$-5+4$$  

• $$5+4$$  

• $$-5+\left|-4\right|$$  

• $$\left|-5+4\right|$$  

• $$-5+\left(-4\right)$$  

Multiple Choice

Which expression is illustrated on this number line?

• 80 + 0

• 40 + 40

• 40 - 0

• 40 - 40

Multiple Choice

Which expressions is illustrated on this number line?

• 35 + 5

• 40 - 5

• 40 + 5

• 35 - 40