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definition of multiplying fractions?

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Q: What is the definition of multiplying fractions?
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How is multiplying rational numbers like multiplying fractions and multiplying decimals?

Fractions and decimals are usually rational numbers. Besides, multiplying rational and irrational numbers is also similar.


When multiplying fractions do you times the denominators if they are the same?

no you do not


Do you need to change the denominator when multiplying fractions?

No.


Do they have multiplying fraction worksheets?

There are many sites available that offer worksheets for practice in multiplying fractions. Here is the address of one of them: www.math-aids.com/Fractions/Multiplying_Fractions.htm.


How is multiplying fractions by a whole number is different from adding adding and subtracting fractions with like denominators?

Adding and subtracting fractions can ONLY be done if the denominators are the same; then the calculation is done by adding or subtracting the numerators. Multiplying (and dividing) fractions does not require the denominators to be the same. To divide by a fraction the divisor is inverted (the original numerator becomes the new denominator and the original denominator becomes the new numerator) and then the fractions are multiplied. Multiplying fractions is achieved by multiplying the numerators together AND multiplying the denominators together. A whole number is the same as a fraction with the whole number as the numerator and a denominator of 1, so when multiplying by a whole number the denominator is multiplied by 1 (leaving it the same) and the is multiplication is effectively just multiplying the numerator by the whole number.