Answer:
9 + 10 = 19
1 + 2 = 3
Step-by-step explanation:
To add 2 to 1, look at a number line and start at the point 1 and go two numbers to the right to end at 3.
Answer:
13
Step-by-step explanation:





The difference is the result of a subtraction problem.
We are given two values that are being subtracted: 54 and a number, represented by 
So, represent this mathematically with
.
Answer: Buying the 5 tickets to the next hockey game is better because the unit price is only 16$
Step-by-step explanation:
80 / 5 = 16
50 / 3 = 16.666
Your answer, in your set notation, is
{-2, 7}