How do these people put one word when they answer questions? I have to have 20 letters or something and they just put C.

No, it is not neccesary, although it is preferable/

Step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.

the one below it is a function