Word problems
The temperature at noon was 88 degrees. By midnight it had dropped 12 degrees. What is the temperature at midnight?
88 - 12 = 76 degrees
-4 x 7 - 14
-42
-7+12
5
-6 x -9
54
What operation would you use when something is rising?
Addition
A scuba diver is at a depth of -84ft. He then rises 19ft. What is his depth now?
-84 + 19 = -65ft
15 + -9 / -3
18
19--8
27
12 / -4
-3
What operation would you use if a problem asks to split equally?
Division
A group of hikers are hiking down a mountain, decreasing at a rate of 400ft per hour. After 3 hours, how far have they gone down the mountain?
-400 x 3 = -1200ft
(25 - -16) + 36 / -6
35
32+ -4 - 6
22
-18 / 9 x 8
-16
What operation would you use if a problem asks you to find how much remains?
Subtraction
The population of a town is changing at a rate of -175 per year. How many years will it take for the change in population to be -1,050?
-1,050 / -175 = 6 years
1 - (9 - 4) / 5
0
-17 - 14 - -3
-28
-3 x -8 / 12
2
What operation would you use when a problem asks for the difference?
Subtraction
Kayla's credit card bill showed she owed $250. She made a payment of $200 but then charged $38 for gasoline. What is her new balance?
-250 + 200 - 38 = -88
7 x -5 - (-8 + 3) + 14
-16
45 + -9 -13
23
60 / -5 x -4
48
If I drive my car 6 times each day, what operation would you use to find how many times I drive in one week?
Multiplication