Multiply & Divide Rational Numbers

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Multiplying and Dividing Rational Numbers

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Presentation transcript:

Multiply & Divide Rational Numbers 9/21/16

Multiply & Divide Integer Rules Same Sign- Positive Different Sign- Negative

Multiply Fractions Multiply the numerators (top) Multiply the denominators (bottom) Reduce Scroll down and watch the animation! https://www.mathsisfun.com/fractions_multiplication.html Watch ME!!! https://www.youtube.com/watch?v=_7iIvH0GCdU http://www.virtualnerd.com/middle-math/multiplying-dividing-fractions/multiply/multiply- fractions-definition

Practice Multiplying Fractions

Divide Fractions Keep-the first fraction the same Change- division to multiplication Flip- the second fraction to its reciprocal Scroll Down and watch the animation! https://www.mathsisfun.com/fractions_division.html Watch me! https://www.youtube.com/watch?v=IVVB_zxAOws http://www.virtualnerd.com/middle-math/multiplying-dividing-fractions/divide/divide- fractions-example

Practice Dividing Fractions

Multiply & Divide Mixed Numbers Convert all mixed numbers to improper fractions. http://www.virtualnerd.com/middle-math/multiplying-dividing-fractions/mixed-number- multiply/multiply-mixed-numbers-example http://www.virtualnerd.com/middle-math/multiplying-dividing-fractions/mixed-number- divide/practice-divide-mixed-numbers

Practice w/ Mixed Numbers

Multiply Decimals https://www.mathsisfun.com/numbers/decimals-multiplying-animation.html http://www.virtualnerd.com/middle-math/decimals/multiplying/decimal-multiplication- method Multiply as if decimals are not there. (Do NOT line up the dot) Put in the decimal afterwards. Count how many numbers are after the decimals, then move the decimal to the left that many spaces in your final answer.

Practice Multiplying Decimals

Divide Decimals https://www.mathsisfun.com/numbers/decim als-dividing-animation.html http://www.virtualnerd.com/middle- math/decimals/dividing/long-division- decimals-example

Practice Dividing Decimals

Tutorials https://cainc.i-ready.com/lessonPreview.jsf?componentId=DI.MATH.NO.7.1002.10