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Question

Complete the table by finding the product and the quotient of Expression 1 and Expression 2.

Write your answers in scientific notation.

Explain your method.


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Solution

Step1. Perform multiplication and division between Expression 1 and Expression 2 and then write under column Product and Quotient respectively.

Expression 1 Expression 2 Product Quotient

3×104 1×104 3×108 3

4×103 2×102 8×105 2×101

7.7×10-2 1.1×10-3 8.47×10-5 7×101

4.5×105 3×10-1 13.5×104 1.5×106

Step 2. The method used for multiplication is (a×10x)×(b×10y)=(a×b)×(10x×10y)=(a×b)×(10x+y)

and for division is (a×10x)÷(b×10y)=(a÷b)×(10x÷10y)=(a÷b)×(10x-y).


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