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#### Online Quiz (WorksheetABCD)

Questions Per Quiz = 2 4 6 8 10

### Grade 7 - Mathematics1.8 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 1.2 x 104 and 3.0 x 1033.6 x 1073.6 x 1063.6 x 108 Q 2: Multiply 3.0 x 102 and 6.0 x 1031.8x 10618 x 1051.8x 105 Q 3: Multiply 9.0 x 103 and 2.0 x 1031.8 x 1081.8 x 1061.8 x 107 Q 4: Multiply 2.0 x 102 and 9.0 x 1021.8 x 1021.8 x 10-41.8 x 104 Q 5: Multiply 2.2 x 106 and 2.0 x 1022.4 x 1084.4 x 1084.4 x 107 Q 6: Multiply 1.2 x 105 and 3.0 x 10236 x 1073.6 x 10-73.6 x 107 Q 7: Multiply 5.0 x 104 and 8.0 x 1034.0 x 1084.0 x 1064.0 x 107 Q 8: Multiply 9.0 x 103 and 1.0 x 1039.0 x 1069.0 x 1059.0 x 103 Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!