Show:
Math Potpurri
Adding Rational Numbers
Subtracting Rational Numbers
Vocabulary
Halloween
True or False? Justify.
100

2 part question: 

Part 1 - what is the sign of the sum of 2 negative numbers? 

Part 2 - what is the sign of the sum of 2 positive numbers?


Part 1- Negative


Part 2-Positive

100

130 + (-65)

65

100

7-15 - (-18) 

20


100

Whole numbers and their opposites.

integers

100

Name this Halloween Movies 

What is Coraline

100

The sum of two negative integers is always positive.

False because...you are to the left of zero and go more negative.

200

DOUBLE JEOPARDY!!!!

How do you know what sign will be for the sum of a negative and positive number?

The answer will have the same sign as the number with the greatest absolute value. 


200

-6 + 3 + (-2)

-5

200

-8 1/2 - 4 

-12 1/2
200

Numbers greater than zero

positive integers

200

What mask is associated with the Friday of the 13th? 

Hockey Mask

200

An integer and the absolute value of that integer are always opposites.

False because...

6 and the absolute value of 6 are not opposites

Only sometimes true if negative signs are used in the problem

300

How do we subtract rational numbers?

We add the opposite

300

-26 2/5 - (-11 1/5)

What is -15  1/5

300

-4 4/5 - (-6  2/5) 

8/5 or     1 and 3/5 

300

Any number that can be written as a fraction

Rational number

300

The fear of clowns is called coulrophobia. Name this clown. 

PennyWise 

300

DOUBLE JEOPARDY!!!! Subtracting negative numbers will always be negative

False

400

How would you model 3 - 7 on a number line?

answers may vary


400

Find the sum 10.43 + (-2.5) 

what is 7.93

400

-12.3 - (-4.56)

-7.74

400

What are additive inverses?

what you add to a number to get zero

400

Name this object

What is a ghourd

400

True or False? - | -10| = -10

True

|-10| = 10 

However, don't forget the negative sign outside the absolute value. 

Therefore, - |-10| = -10 

500

Two submarines are underwater. The number −4,451 represents Submarine A's position (in feet) relative to the surface. The number −4,979 represents Submarine B's position (in feet) relative to the surface. Which submarine is closer to the surface?

Submarine A

500

-5 3/6 - (-10 2/3) 

What is 5 1/3 

500

-92.8 + 41.5 - 8.3

-59.6

500

What is absolute value?

Absolute value is the distance between 0 and a number

500

 why did we originally carve pumpkins for halloween

to scare evil spirits

500

-10 - (-5) - (-3) = -18

False