Читать книгу Basic Math & Pre-Algebra All-in-One For Dummies (+ Chapter Quizzes Online) - Mark Zegarelli - Страница 28

Addition is the first operation you find out about, and it’s almost everybody’s favorite. It’s simple, friendly, and straightforward. No matter how much you worry about math, you’ve probably never lost a minute of sleep over addition. Addition is all about bringing things together, which is a positive goal. For example, suppose you and I are standing in line to buy tickets for a movie. I have $25 and you have only $5. I could lord it over you and make you feel crummy that I can go to the movies and you can’t. Or instead, you and I can join forces, adding together my $25 and your $5 to make $30. Now, not only can we both see the movie, but we may even be able to buy some popcorn, too.

Addition uses only one sign — the plus sign (+): Your equation may read or but the plus sign always means the same thing.

When you add two numbers together, those two numbers are called addends, and the result is called the sum. So in the first example, the addends are 2 and 3, and the sum is 5.