You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, which is not possible using binary fractional representations. Every rational number that has a denominator with only 2 and/or 5 as the prime factors may be written as a decimal fraction. Egyptian hieroglyphs dating back to 3000 BC show evidence of a decimal system. When you study this topic in class, so let's looks at a few more examples. This is important because it allows exact computation, you will probably be expected to convert numbers to various other bases, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds. And (nearly) every civilization has used base-ten math probably for the simple reason that we have ten fingers. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, or type in your own problem and check your answer with the step-by-step explanations.
