Question

joe is preparing 18 hot dogs for his party. However, Joe only has 12 hot dog buns. How many more hot dog buns does Joe need?*

Answer 1

Its quite simple. Its just subtraction.
18 hotdogs - 12 hotdog buns = 6 hotdug buns still needed

Answer 2

18-12= 6
6 is the amount of hotdog buns needed.

You subtract 12 from 18 because you already have that amount of buns and need to see how many you need to get.