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In money it would be... $49.50+$49.50=$99. But, carry your ones in this problem. Thanks, Cookie
A waitress gives you the bill so she needs to know how to add the numbers so you know how much money to pay.
To count money, they have to multiply. When the multiplication is finished they have to add the products together. When some one deposits or withdraws money, the banker uses adding and subtracting to find the new balance of the account.
That's right, negative numbers are less than zero. If you have trouble with this concept, think about money. If you have no money and you are also in debt, that is the equivalent of having a negative amount of money. Even when you get some money, if you use it to pay off your debt you could still be left with no money. So with a negative quantity, you need to add to that quantity just to get to zero.