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# How are decimal fractions added, subtracted, multiplied, and divided?

Decimal fractions are added, subtracted, multiplied and divided much like whole numbers—but with decimal differences. The following gives some examples: Adding such numbers as 0.3 + 0.2 is simple: 0.3 + 0.2 = 0.5. Adding whole and decimal fractions is also easy: 2.4 + 5 = 7.4. These numbers are also easy to subtract, such as 0.3 – 0.2 = 0.1. Multiplication and division are also similar to regular numbers, although the placement of the decimal point is ever-important. For example, multiplying 24.45 × 0.002 = 0.0489; dividing the same numbers 24.45/.002 = 12,225. (It’s interesting to note here a “mathematical surprise”: In the last example, dividing the small numbers equaled a much larger number—the opposite of what most of us would expect.)

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