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Published byPosy Miles Modified over 7 years ago

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Using Scientific Notation in Multiplication and Division Lesson Two and Lesson Three

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WARM UP

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EXAMPLE ONE GIVEN: (2.93 X 10 -2 ) (8.3 X 10 -5 ) MULTIPLY DECIMALS: 2.93 X 8.3 = 24.319 ADD EXPONENTS: 10 -2 X 10 -5 =10 -2+(-5) =10 -7 ANSWER: 24.319 X 10 -7 REWRITE IN SCIENTIFIC NOTATION FINAL ANSWER: 2.43 X 10 -6

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EXAMPLE TWO GIVEN: 3.42 X 10 5 4.67 X 10 9 MULTIPLY DECIMALS: 3.42 X 4.67 = 15.97 ADD EXPONENTS: 10 5 X 10 9 =10 5+9 =10 14 PRELIMINARY ANSWER: 15.97 X 10 14 NOW, REWRITE IN SCIENTIFIC NOTATION IF NEEDED. FINAL ANSWER: 1.597 X 10 15

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Let’s try three together…… (2 x 10 3 ) (3 x 10 5 ) (3.2 x 10 -5 ) x (1.5 x 10 -3 ) ( (9.2 x 10 5 ) x (2.3 x 10 7 )

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CLASSWORK Work with your partner to complete the scientific notation worksheet using multiplication.

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HOMEWORK Complete the scientific notation worksheet using multiplication. Show all your work.

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WARM UP

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EXAMPLE THREE GIVEN: 3.45 X 10 2 1.23 X 10 -5 DIVIDE DECIMALS: 3.45 ÷ 1.23= 2.81 SUBTRACT EXPONENTS: 2- (-5) = 7 REWRITE IN SCIENTIFIC NOTATION IF NEEDED ANSWER: 2.81 X 10 7

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EXAMPLE FOUR

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Let’s try three together….. (8 10 6 ) ÷ (2 10 3 )(5.76 x 10 2 ) ÷ (4.55 x 10 -4 ) (8.2 x 10 -6 ) / (9.4 x 10 -3 )

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CLASSWORK With your partner, work through the division problems. Show all your work.

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HOMEWORK Complete the scientific notation worksheet using division. Show all your work.

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Need help? Watch the following videos. www.youtube.com/watch?v=ciFOlirz4Js Scientific Notation: multiplication/division Scientific Notation: https://www.youtube.com/watch?v=GD5LbqSqKys

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