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Init 8/24/2011 by Daniel R. Barnes

Scientific Notation. Init 8/24/2011 by Daniel R. Barnes. WARNING: This presentation includes images and other content taken from the world wide web without permission of the owners of that content. Do not copy or distribute this presentation. Its very existence may be illegal. SWBAT.

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Init 8/24/2011 by Daniel R. Barnes

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  1. Scientific Notation Init 8/24/2011 by Daniel R. Barnes WARNING: This presentation includes images and other content taken from the world wide web without permission of the owners of that content. Do not copy or distribute this presentation. Its very existence may be illegal.

  2. SWBAT . . . . . . convert numbers between regular format and scientific notation.

  3. First, we must make sure we’ve learned about powers of ten.

  4. SIMPLE POWERS of TEN 102 = 10 x 10 = 100 103 = 10 x 10 x 10 = 1000 105 = 10 x 10 x 10 x 10 x 10 = 100,000 101 = 10 = 10

  5. NEGATIVE POWERS of TEN 1 1 10-1 = = 0.1 = 101 10 1 1 1 10-2 = = = = 0.01 102 10 x 10 100 1 1 1 10-3 = = = = 0.001 103 10 x 10 x10 1000 1 1 1 10-4 = = = = 0.0001 104 10 x 10 x 10 x 10 10,000

  6. TEN to the ZERO 103 = 1,000 102 = 100 101 = 10 100 = 1 10-1 = 0.1 10-2 = 0.01 10-3 = 0.001

  7. Exponential form English word Fractional form Decimal number 1,000,000 106 one million 1,000,000 1 1,000 103 one thousand 1,000 1 One one-hundredth 1 1 10-2 0.01 = 100 102 One ten-thousandth 1 10-4 0.0001 10,000 1 100 1 one 1

  8. Okay. Now Let’s throw in a multiplier.

  9. Exponential form English word Fractional form Decimal number 50 fifty 50 5 x 101 1 20,000,000 Twenty million 20,000,000 2 x 107 1 four one-thousandths 4 0.0004 4 x 10-3 1000 Seven trillion 7 x 1012 7,000,000,000,000 Three One hundred millionths 3 0.00000003 3 x 10-8 100,000,000

  10. Alright. Now we can try converting a number to scientific notation.

  11. Convert “2015” to scientific notation There’s a decimal point hiding in this number. Where is it? To where do we move the decimal point? 2015 . The first step in converting a number to scientific notation is to move the decimal until there’s one digit in front of it and however many digits are left behind it.

  12. Convert “2015” to scientific notation To where to we move the decimal point? . 2015 2.015 In this case, three spaces to the left.

  13. Convert “2015” to scientific notation It looks like we just turned two thousand into two. That’s not right. That’s not what we’re trying to do. x 103 2.015 To bring it back up to being about two thousand again, we need to multiply it by the right power of ten . . .

  14. Convert “2015” to scientific notation x 103 2.015 2015 =

  15. Let’s practice with some more numbers.

  16. Practice Question #1 x 102 4.65 465 =

  17. Practice Question #2 x 101 3.07 30.7 =

  18. Practice Question #3 x 105 4 400,000 =

  19. Practice Question #4 x 101 1.31712 13.1712 =

  20. Practice Question #5 x 10-1 3.2 0.32 =

  21. Practice Question #6 x 10-3 7.67 0.00767 =

  22. Practice Question #7 x 10-7 6.1 0.00000061 =

  23. Practice Question #8 x 1010 8 80,000,000,000 =

  24. Practice Question #9 x 10-8 0.000000091123 = 9.1123

  25. Practice Question #10 x 10-3 0.009630041 = 9.630041

  26. Practice Question #11 x 108 229,100,000 = 2.291

  27. Practice Question #12 0.0000007212 = 7.212 x 10-7

  28. Practice Question #13 39,700,000 = 39.7 x 107

  29. Okay. That’s great, but, sometimes, you have a number that’s almost in scientific notation, but not quite. What do you do? WHAT DO YOU DO?

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