4.5 Multiplying And
Dividing by Powers
      of Ten
     October 21, 2010
What happens when you multiply
             by powers of ten?
    Fill in the blanks below (in your
                notebo...
What happens when you multiply
            by powers of ten?
        Check your answers (in your
                notebook)...
Multiplying by
Powers of Ten
Multiplying by
    Powers of Ten
***Copy this in your notebook:
Multiplying by
     Powers of Ten
***Copy this in your notebook:

Multiplying by whole number powers of 10: Move the
decim...
Multiplying by
     Powers of Ten
***Copy this in your notebook:

Multiplying by whole number powers of 10: Move the
decim...
Multiplying by
Powers of Ten
Multiplying by
    Powers of Ten
***Copy this in your notebook:
Multiplying by
     Powers of Ten
***Copy this in your notebook:

Multiplying by decimal number powers of 10: Move
the dec...
Multiplying by
     Powers of Ten
***Copy this in your notebook:

Multiplying by decimal number powers of 10: Move
the dec...
Try these on your own (in
      your notebook)


Multiply decimals using mental maths:

0.05 x 1000 =

95.38 x 0.0001
Check your answer (in
   your notebook)
Check your answer (in
     your notebook)

Multiply decimals using mental maths:
Check your answer (in
     your notebook)

Multiply decimals using mental maths:

0.05 x 1000 = 50
Check your answer (in
     your notebook)

Multiply decimals using mental maths:

0.05 x 1000 = 50

Move the decimal 3 pla...
Check your answer (in
     your notebook)

Multiply decimals using mental maths:

0.05 x 1000 = 50

Move the decimal 3 pla...
Check your answer (in
     your notebook)

Multiply decimals using mental maths:

0.05 x 1000 = 50

Move the decimal 3 pla...
Dividing by Powers
      of Ten
Dividing by Powers
      of Ten
*** Copy this in your notebook.
Dividing by Powers
      of Ten
*** Copy this in your notebook.

Dividing by Whole Number Powers of 10: Move the
decimal p...
Dividing by Powers
      of Ten
*** Copy this in your notebook.

Dividing by Whole Number Powers of 10: Move the
decimal p...
Dividing by Powers
      of Ten
Dividing by Powers
      of Ten
*** Copy this in your notebook.
Dividing by Powers
      of Ten
*** Copy this in your notebook.

Dividing by Decimal Number Powers of 10: Move the
decimal...
Dividing by Powers
      of Ten
*** Copy this in your notebook.

Dividing by Decimal Number Powers of 10: Move the
decimal...
Divide Decimals Using Mental
     Math (Now you try: in your
             notebook)



•   508.3 ÷ 10

•   508.3 ÷ 0.01
Divide Decimals Using Mental
      Math (Now you try: in your
              notebook)


•   508.3 ÷ 10 = 50.83

    Move 1...
Try these               (show these problems tomorrow with
                   your homework)


•   6.07 X 1000

•   153.6 ...
When you finish:


•   You may begin your homework.
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4.5 multiplying and dividng by powers of 10

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  • 4.5 multiplying and dividng by powers of 10

    1. 1. 4.5 Multiplying And Dividing by Powers of Ten October 21, 2010
    2. 2. What happens when you multiply by powers of ten? Fill in the blanks below (in your notebook). Whole Number Powers of Ten Decimal Powers of Ten 10 x 8.3 = _____ 0.1 x 8.3 = _____ 100 x 8.3 = _____ 0.01 x 8.3 = _____ 1000 x 8.3 = _____ 0.001 x 8.3 = _____ 10,000 x 8.3 = _____ 0.0001 x 8.3 = _____
    3. 3. What happens when you multiply by powers of ten? Check your answers (in your notebook). Whole Number Powers of Ten Decimal Powers of Ten 10 x 8.3 = 83 0.1 x 8.3 = 0.83 100 x 8.3 = 830 0.01 x 8.3 = 0.083 1000 x 8.3 = 8,300 0.001 x 8.3 = 0.0083 10000 x 8.3 = 83,000 .0001 x 8.3 = .00083
    4. 4. Multiplying by Powers of Ten
    5. 5. Multiplying by Powers of Ten ***Copy this in your notebook:
    6. 6. Multiplying by Powers of Ten ***Copy this in your notebook: Multiplying by whole number powers of 10: Move the decimal point one place to the right for each zero in the whole number power 10.
    7. 7. Multiplying by Powers of Ten ***Copy this in your notebook: Multiplying by whole number powers of 10: Move the decimal point one place to the right for each zero in the whole number power 10. Numbers 3.995 x 100 = 3.99.5
    8. 8. Multiplying by Powers of Ten
    9. 9. Multiplying by Powers of Ten ***Copy this in your notebook:
    10. 10. Multiplying by Powers of Ten ***Copy this in your notebook: Multiplying by decimal number powers of 10: Move the decimal point one place to the left for each zero in the whole number power 10.
    11. 11. Multiplying by Powers of Ten ***Copy this in your notebook: Multiplying by decimal number powers of 10: Move the decimal point one place to the left for each zero in the whole number power 10. Numbers 399.5 x 0.001 = 399.5
    12. 12. Try these on your own (in your notebook) Multiply decimals using mental maths: 0.05 x 1000 = 95.38 x 0.0001
    13. 13. Check your answer (in your notebook)
    14. 14. Check your answer (in your notebook) Multiply decimals using mental maths:
    15. 15. Check your answer (in your notebook) Multiply decimals using mental maths: 0.05 x 1000 = 50
    16. 16. Check your answer (in your notebook) Multiply decimals using mental maths: 0.05 x 1000 = 50 Move the decimal 3 places to the right.
    17. 17. Check your answer (in your notebook) Multiply decimals using mental maths: 0.05 x 1000 = 50 Move the decimal 3 places to the right. 95.38 x 0.0001 = 0.0009538
    18. 18. Check your answer (in your notebook) Multiply decimals using mental maths: 0.05 x 1000 = 50 Move the decimal 3 places to the right. 95.38 x 0.0001 = 0.0009538 Move the decimal 4 places to the left.
    19. 19. Dividing by Powers of Ten
    20. 20. Dividing by Powers of Ten *** Copy this in your notebook.
    21. 21. Dividing by Powers of Ten *** Copy this in your notebook. Dividing by Whole Number Powers of 10: Move the decimal point one place to the left for each zero in the whole number power of 10.
    22. 22. Dividing by Powers of Ten *** Copy this in your notebook. Dividing by Whole Number Powers of 10: Move the decimal point one place to the left for each zero in the whole number power of 10. 35 ÷ 100 = 0.35. = 0.35
    23. 23. Dividing by Powers of Ten
    24. 24. Dividing by Powers of Ten *** Copy this in your notebook.
    25. 25. Dividing by Powers of Ten *** Copy this in your notebook. Dividing by Decimal Number Powers of 10: Move the decimal point one place to the right for each zero in the whole number power of 10.
    26. 26. Dividing by Powers of Ten *** Copy this in your notebook. Dividing by Decimal Number Powers of 10: Move the decimal point one place to the right for each zero in the whole number power of 10. 35 ÷ 0.001 = 35.00 = 3,500
    27. 27. Divide Decimals Using Mental Math (Now you try: in your notebook) • 508.3 ÷ 10 • 508.3 ÷ 0.01
    28. 28. Divide Decimals Using Mental Math (Now you try: in your notebook) • 508.3 ÷ 10 = 50.83 Move 1 place to the left. • 508.3 ÷ 0.01 = 50,830 Move 2 places to the right.
    29. 29. Try these (show these problems tomorrow with your homework) • 6.07 X 1000 • 153.6 X 0.01 • 42.6 ÷ 100 • 509 ÷ 1000 • 5 ÷ 0.1 • 3.2 ÷ 0.001
    30. 30. When you finish: • You may begin your homework.

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