shortage Why can't producers increase supply if there is a sudden increase in demand? you would have to increase the price as well because otherwise it would cost too much to increase supply
Addition (often signified by the plus symbol +) is one of the four elementary, mathematical operations of arithmetic, with the others being subtraction, multiplication and division. The addition of two whole numbers is the total amount of those quantities combined. For example, in the picture on the right, there is a combination of three apples and two apples together; making a total of 5 apples.
You can add two natural numbers together, and you will always get another natural number, as in the famous fact that one and one are two. Subtraction, on the other hand, is trickier. If you subtract a number, for example the number 5, from itself, you get something new, something that is not a natural number at all. We call it the number 0 or zero. And if you subtract a number, again say 5, from a smaller number, say 3, then you get something else that is new, namely a negative integer, which in this case is -2, called minus two.