Addition or Subtraction
a + 3 = 8
5
Give me an example of a variable
any letter
a/12 = -4
-48
Lisa is cooking muffins. The recipe calls for 7 cups of sugar. She has already put in 2 cups. How many more cups does she need to put in?
What is: 2+x=7 and what is 5
a - 10 = 13
Give me an example of a inverse operations
The opposite signs that undo each other
a/7 = 4
28
How many packages of diapers can you buy with $40 if one package costs $8?
What is 8n=40 and n=5
a + 66= 21
-45
What is the inverse operation of addition?
Subtraction
18g = 486
27
At a restaurant, Mike and his three friends decided to divide the bill evenly. If each person paid $13 then what was the total bill?
What is n/4=13 what is 52?
a - 48= 28
76
Name the 4 operations
addition, subtraction, multiplication, division
12y = -144
-12
How many boxes of envelopes can you buy with $12 if one box costs $3?
a + (-12) = 86
86
What can you do to check your answer when solving?
Plug your answer in
-8x = 56
-7
After paying $5.12 for a salad, Norachai has $27.10. How much money did he have before buying the salad?
What is n-5.12=27.10 and n=32.22