We can add, subtract, multiply, and divide decimal numbers. Addition and subtraction of decimal numbers works the same way as whole number addition and subtraction; we just need to make sure that we line up the decimal points.
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There are two kinds of decimal numbers that go on forever and ever. Some decimals that go on forever eventually get to a point where a certain digit (or sequence of digits) repeats infinitely, but some decimal number that go on forever don’t repeat. We’ll look here at how to simplify repeating decimal numbers.
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When we’re dealing with decimal numbers, rounding is an important tool that we need to know how to use. When we round, we always round to a certain decimal place.
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