Question 1. What are the four operations of arithmetic, and what are their operation signs?

May 28th, 2015
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ALGEBRA IS A METHOD OF WRITTEN CALCULATIONS that helps us reason about numbers. At the very outset, the student should realize that algebra is a skill.

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ALGEBRA IS A METHOD OF WRITTEN CALCULATIONSthat helps us reason about numbers. At the very outset, the student should realize that algebra is a skill. And like any skill -- driving a car, baking cookies, playing the guitar -- it requires practice. A lot of practice. Written practice. That said, let us begin.The first thing to note is that in algebra we use letters as well as numbers. But the letters represent numbers. And the rules of algebra correspond to the rules of arithmetic, but we write those rules using letters.For example, we know in arithmetic that the order in which we add two numbers does not matter.7 + 3 = 3 + 7.In algebra, we express that as the rule:a+b=b+a.Letterasimply means the first number -- whatever it might be. Letterbmeans the second number. We use letters because we mean that the rule will be true foranynumbers. In algebra, we imitate with letters what we could write with numbers. (The symbols for numbers, after all, are nothing but written marks. And so are lettersAs the student will see, algebra depends only on the patterns that the symbols make.)The numbers are the numerical symbols, while the letters are calledliteralsymbols.Question 1.What are the fouroperationsof arithmetic, andwhat are theiroperation signs?To see the answer, pass your mouse over the colored area.To cover the answer again, click "Refresh" ("Reload").Do the problem yourself first!1) Addition: a+b. Th

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