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We use a base ten number system. Computers use a binary or base two number system. How does a base two number system
work? Sounds like extra credit to me. You might also choose to research the Egyptian number system.
When adding or subtracting fractions, the denominators must be the same. If they are not, find a common denominator. Remember,
you can't add things that aren't the same. A common denominator is the least common multiple of two numbers.
When multiplying and dividing fractions, you must first make all numbers into fractions. That means 4 has to be rewritten
as 4/1 and 3 1/2 has to be rewritten as 7/2. Also, don't forget, you can't divide by a fraction. Instead you multiply by its
reciprocal or inverse. In other words, you can't divide by 3/4, you multiply by 4/3.
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