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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
1.8 Multiplying Numbers Written in Scientific Notation

To Mutilpy using Scientific Notation:

  • Multiply decimal numbers with each other.
  • Use exponent rules to "combine" powers of 10.
  • If the answer is not in "correct" scientific notation form, convert or rewrite to correct notation.
    Example:
    Multiply 3.0 x 102 and 5.0 x 103
    3.0 x 5.0 x 102 x 103
    =15 x 102 + 3 (Law of indicies: am x an=am+n)
    =15 x 105
    Rewrite to correct scientific notation form we get: 15.0 = 1.5 x 101
    =1.5 x 106

    Other examples:
    4.0 x 102 x 2.0 x 102 = 8.0 x 104
    6.0 x 103 x 3.0 x 102 = 18 x 105= 1.8 x 106
    1.2 x 105 x 4.0 x 102 = 4.8 x 107

    Directions: Solve the following questions. Also write atleast 5 examples of your own.
  • Q 1: Multiply 9.0 x 104 and 9.0 x 103
    8.1 x 107
    8.1 x 106
    8.1 x 108

    Q 2: Multiply 2.2 x 106 and 2.0 x 102
    2.4 x 108
    4.4 x 107
    4.4 x 108

    Q 3: Multiply 1.2 x 105 and 3.0 x 102
    3.6 x 10-7
    3.6 x 107
    36 x 107

    Q 4: Multiply 1.2 x 104 and 3.0 x 103
    3.6 x 107
    3.6 x 106
    3.6 x 108

    Q 5: Multiply 9.0 x 103 and 2.0 x 103
    1.8 x 107
    1.8 x 108
    1.8 x 106

    Q 6: Multiply 2.0 x 102 and 9.0 x 102
    1.8 x 104
    1.8 x 10-4
    1.8 x 102

    Q 7: Multiply 3.0 x 102 and 6.0 x 103
    1.8x 106
    18 x 105
    1.8x 105

    Q 8: Multiply 9.0 x 103 and 1.0 x 103
    9.0 x 103
    9.0 x 106
    9.0 x 105

    Question 9: This question is available to subscribers only!

    Question 10: This question is available to subscribers only!


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