Writing Equations
Write an equation using addition to show the following story:
My grandma gives me $10, and I spend $4 dollars.
10 + (-4)
If the temperature is 12 degrees and drops by 20 degrees, what is the final temperature?
-8 degrees
What is the difference between terminating and repeating decimals?
Terminating Decimals - End
Repeating Decimals - Keep going on forever
|-5| = ?
5
30+6x=60
x=5
Write an equation using addition to show the following story:
I owe 9 dollars, and then earn 4.
-9 + 4
Why is the addition of a negative the same as subtracting a positive?
If you add a positive integer, the value will increase. Therefore, if you add a negative (which is the opposite), the value will decrease, as you are adding a value in the opposite direction.
2 - (-1)
3
-|5|
-5
1/2(x+7)=14
x=21
Write an equation using addition to show the following story:
I swim 12 feet down, then swim 12 feet back up.
-12 + 12
The temperature decreases by 4 degrees. What is another way to say this?
The temperature increases by negative 4 degrees
The following integer card were pulled. What is the score?
4, 3, 9, -12
4
|-1.00000| =
1
What is the distance between 11 and -12?
23
Write an equation using addition to show the following story:
I got 10 points extra credit, but got 15 points off my test.
10 + (-15)
The temperature increases by 31 degrees. What is another way to say this?
The temperature decreases by negative 31 degrees.
What is the additive inverse of 9?
-9
-|23|
-23
What is the distance between -20 and 23?
43
After giving away 10 dollars, I have 3 dollars left.
13 + (-10)
Why does the subtraction of a negative, result in the addition of a positive?
This occurs because the negative sign indicates the value is opposite of a positive. Since taking away a positive is the same as subtraction, the inverse of this is taking away a negative, which is addition.
342,234 - (-2)
342,236
|100|
100
What is the distance between -100 and 100?
200