Integers
-8 + (-4)
-12
-25.8 + 3.2
-25.8 + 3.2
25.8 - 3.2 = 22.6
- 22.6
Use the commutative property to write an expression equivalent to:
-7 + 4
4 + (-7)
What two points are exactly 4 units away from zero?
4 and -4
Sandy has $20. If she buys a backpack for $12.50 and a new notebook for $2.25, how much money will she still have?
She will have $5.25.
12 - 20
12 + (-20)
20-12 = 8
-8
7.30 –(-2.75)
7.30 –(-2.75)
7.30 + 2.75
10.05
Write another expression that is equivalent to:
5 - 7
5 +(-7) or -7 + 5
What two points are exactly 3.5 units away from zero?
3.5 and -3.5
You are playing golf with your mom. On the first hole you scored a 2. On the second hole you scored -1. On the third hole you scored -2. What is your current score?
My current score is -1.
-3 – (-2)
-3 – (-2)
-3 + 2
3-2=1
-1
½ + (-2 ½)
½ + (-2 ½)
2 ½ - ½ = 2
-2
Change it to addition:
-4 –(9)
-4 –(-9) is equivalent to:
-4 + 9
When modeling this expression, which direction should the second arrow point?
-5 + 4
Your whiteboard should say "left" or "right"
More positive points to the:
Right
What is the distance between 648 and -178?
|648 - (-178)|
|648 + 178|
|826|
826
15 - 20 + 3
15 - 20 + 3
15 + (-20) + 3
15 + 3 = 18
20 - 18 = 2
-2
Lucky you! Your team wins 40 points!
Lucky you! Your team wins 40 points!
Write 2 different equivalent expressions for:
5 + (-8)
-8 + 5
5 – 8
-8 –(-5)
When modeling this expression, which direction should the second arrow point?
-5 - (-4)
Your whiteboard should say "left" or "right"
Less negative points to the:
Right
In one day you withdrew $24 and deposited $19. What was the overall change in your account?
The overall change in the account is -$5.
-12 + 4 –(-3)
-12 + 4 –(-3)
-12 + 4 + 3
-12 + 7
12 - 7 = 5
-5
-7.5 + 3.4 – 2.2
-7.5 + 3.4 – 2.2
-9.7 + 3.4
9.7 - 3.4 = 6.3
-6.3
You must be lucky! Your team gets 50 points!
You must be lucky! Your team gets 50 points!
Will the value of this expression be positive or negative:
- 5 - 7
Negative
Oh, you're the lucky one! Your team gets 50 points!
Oh, you're the lucky one! Your team gets 50 points!