If you are adding a positive number, which way are you going to move on the number line?
You are going to move to the right.
200
-34 + 25 + (-25)
-34
200
-15 + (-10)
-25
200
-10 - 3
-13
200
10 - (-12)
24
200
If you subtract a negative number which way will you move on a number line? ex. a - (-b)
You would move to the right.
300
13 + (-19)
-6
300
-17 + 20 + (-3)
0
300
-12 - (-8)
-4
300
-6 - (-8)
2
300
Evaluate the expression x - (-y) if x = -8 and y = 7
-1
400
Simplify x + (-5) + 1
x + (-4) or x - 4
400
Simplify -9 + m + (-6)
-15 + m
400
A team gained 5 yards on their first play of the game. Then they lost 6 yards. Find the total change in yardage.
-1 yd
400
Evaluate the expression |y - z| when y = 7 and z = -11
18
400
20 + (-20)
0
500
The temperature is -3*. An hour later it drops 6* and 2 hours later it rise 4*. Write an addition expression to describe this situation. Then find the final temperature.
-3 + (-6) + 4
The final temperature is -5*
500
Amelia has $152 in the bank. She withdraws $20. Then she deposits $84. Write an addition expression to represent this situation . Then find the sum.
152 + (-20) + 84 = 216
500
A roller coaster begins at 90 feet above ground level. Then it
descends 105 feet. Find the height of the coaster after the first descent.
-15 ft
500
Your checking account is overdrawn by $50. You write a check for $20. What is the balance in your account?