Integer Operations Lesson

Integer Operations Lesson

by Mr. Polascak

​Adding Integers

​Same signs:

​ ADD & KEEP THE SIGN

​ 6 + 7 = 13

​-6 + (-7) = -13

​

​Different signs:

​ SUBTRACT & KEEP THE SIGN THERE IS MORE OF

​ 6 + (-7) = -1

​-6 + 7 = 1

Multiple Choice

$$12\ +\ \left(-8\right)$$  

• 20

• -20

• 4

• -4

Multiple Choice

$$-3\ +\left(-11\right)$$  

• -14

• 14

• -8

• 8

Multiple Choice

$$-21\ +\ 4+\left(-6\right)$$  

• 19

• -19

• -23

• 23

Fill in the Blank

$$24\ +\left(-21\right)$$  

Fill in the Blank

$$-11+\left(-11\right)$$  

​Subtracting Integers

​Change all subtraction problems to ADDING the next number's OPPOSITE

​Then follow normal ADDING rules!

​6 - 12

​6 + (-12) = -6

​

​-7 - 3

​-7 + (-3) = -10

​

​8 - (-2)

​8 + 2 = 10

Multiple Choice

12 - (-4)

• 16

• -16

• 8

• -8

Multiple Choice

-3 - 14

• 17

• -17

• 11

• -11

Fill in the Blank

14 - 18

Multiple Choice

-2 - (-7) - 3

• -12

• 12

• -2

• 2

Fill in the Blank

17 - (-17)

​Multiplying or Dividing Integers

Multiple Choice

$$-12\div\left(-4\right)$$  

• 3

• -3

• -16

• -8

Multiple Choice

$$12\cdot\left(-3\right)$$  

• 36

• -36

• 15

• 9

Multiple Choice

$$2\cdot-8\div4$$  

• 4

• -4

• 16

• -16

Fill in the Blank

$$24\div\left(-6\right)$$  

Fill in the Blank

$$-8\cdot-6$$  

PRACTICE TIME

​

Multiple Choice

Subtracting a negative is the same thing as...

• Becoming more negative

• Adding a positive

• Becoming 0

• Impossibility

Multiple Choice

When ADDing two integers with the SAME SIGN...

• Add and keep the same sign.

• Add and change the sign.

• Subtract and keep the same sign.

• Subtract and change the sign.

Multiple Choice

When subtracting two integers...

• Add them together

• Ignore the signs and subtract

• Change the operation into addition and the second number's sign

• It will always be negative

Multiple Choice

When multiplying two numbers with the SAME SIGN...

• Your answer is negative

• Your answer is positive

• It depends on if they are positive or negative numbers

• Your answer has the same sign.

Multiple Choice

When dividing two numbers with DIFFERENT signs...

• Your answer takes the sign of the bigger number

• You can't divide

• Your answer is positive

• Your answer is negative

Multiple Choice

$$-5+7=?$$  

• 12

• 2

• -2

• -12

Fill in the Blank

$$12+(-3)$$  

Multiple Choice

$$7\ -\ 13\ =\ ?$$  

• 6

• -6

• 20

• -20

Fill in the Blank

$$-6\ -\ 10\ =\ ?$$  

Multiple Choice

$$-7\ \cdot\ -8\ =?$$  

• 56

• -56

• 42

• 15

Fill in the Blank

$$12\ \cdot\ -4\ =?$$  

Multiple Choice

$$-72\div12\ =?$$  

• 8

• -8

• -6

• 6

Fill in the Blank

$$-36\div-4=?$$  

Multiple Choice

In the Sahara Desert one day it was 136°F. In the Gobi Desert a temperature of -50°F was

recorded. What is the difference between these two temperatures?

• 86°F

• 186°F

• -86°F

• -186°F

Multiple Choice

In Buffalo, New York, the temperature was -14°F in the morning. If the temperature dropped 7°F, what is the temperature now?

• 7°F

• 21°F

• -21°F

• -7°F

Multiple Choice

Mt. Everest, the highest elevation in Asia, is 29,028 feet above sea level. The Dead Sea, the lowest elevation, is 1,312 feet BELOW sea level (HINT: that's -1,312). What is the difference between these two elevations?

• 30,340 feet

• 27,716 feet

• -27,716 feet

• -30,340 feet