Integer Operations review

Integer Operations Review

March 15, 2021

Asynchronous Monday

Learning Goal

I can add, subtract, multiply and divide integers and can list my steps in order.

Multiple Choice

We can change subtraction into addition. Which is equivalent to -12 - 3 ?

• -12 + (-3)

• -12 + 3

• 12 + 3

• 12 - 3

Multiple Choice

(-9)(-8)

• -72
• 72
• 81
• -81

Multiple Choice

 $\frac{44}{-4}$  =

• 11

• -8

• -11

• -1/11

Multiple Select

Select all of the expressions that would give you a negative answer. Show evidence of your thinking.

• (-21)(6)

• $\frac{-27}{-3}$

• $\frac{-60}{10}$

• -5(9)

Multiple Choice

(-7) (4) =

• 24

• 28

• -28

• -24

Multiple Choice

Fill in the blank:

A NEGATIVE number divided by a NEGATIVE number is ____________ POSITIVE.

• always

• never

• sometimes

Multiple Choice

Rewrite this subtraction problem as an equivalent addition problem:

5 - (-2)

• 5 + 2

• -5 + 2

• 5 + -2

• -5 + -2

Multiple Choice

Rewrite this subtraction problem as an equivalent addition problem:

-12 - 8

• -12 + -8

• 12 + -8

• -12 + 8

• 12 + 8

Multiple Choice

Math Hospital-

What did the student do wrong in the problem?

• The student did not change the subtraction problem to an equivalent before solving the with tiles.

• The student did not cross off the correct amount of zero pairs.

• The student use the rule for addition.

• Nothing the problem is correct.

Multiple Choice

Math Hospital continued... What is the correct answer to this problem?

• -2

• 10

• 12

• 2

Multiple Choice

Divide 8/-4

• -2

• 4

• -4

• 2

Multiple Choice

Divide -20/10

• 10

• 2

• -2

• -10

Fill in the Blank

Divide

 $\frac{-24}{7}$  

Multiple Choice

True or false.

The rules for dividing and multiplying integers are the same.

• True

• False

Multiple Choice

Multiplying integers with the SAME sign;

• The answer is always positive.

• The answer is always negative.

• The answer is seldom positive.

• The answer is sometimes negative.

Multiple Choice

To add integers with different signs,

• subtract the integers and keep the sign of the one with the greatest absolute value.

• subtract and then it will be positive.

• add the numbers and forget about the signs.

• subtract until you get zero.

Multiple Choice

To add integers with the SAME sign,

• subtract and make it negative.

• add the integers and keep the sign.

• add the numbers and it’s always positive.

• subtract the numbers and it’s always zero.

Multiple Choice

When multiplying and dividing, if the signs of the two numbers are the SAME, then the answer is going to be...

• Negative

• Positive

• I don't know

Fill in the Blank

-9 + (-2)

Multiple Choice

6 + (-4)

• 2

• -2

• 10

• -10

Fill in the Blank

What is the opposite of -7?

Fill in the Blank

What is the opposite of -7?

Multiple Choice

When multiplying and dividing, if the signs of the two numbers are the SAME, then the answer is going to be...

• Negative

• Positive

• I don't know

Now let's challenge your thinking

with level 4 problems

Multiple Choice

* Challenge problem. Test your knowledge.

I had 73 dollars in my checking account but then spent 111 dollars at the store. What is the amount in my account?

• 184 dollars

• 38 dollars

• -38 dollars

• -184 dollars

Multiple Choice

* Challenge problem. Test your knowledge.

The temperature on Sunday was -15^o C. The temperature on Monday was 12 degrees colder than the temperature on Sunday. What was the temperature on Monday?

• -27^o C

• 27^o C

• -3^o C

• 3^o C

Multiple Choice

* Challenge problem. Test your knowledge.

If it is 85 degrees in California and -4 degrees in Nebraska, how many degrees warmer is it in California?

• -89

• 81

• 89

• -81

Thank you for playing!

Office hours are open today from 2 pm to 3:30 pm, please attend if you have questions or need support. See you Tuesday in class!