Question

Charlie is evaluating the product of 0.09 and 0.05. He multiplies, and before placing the decimal, arrives at an answer of 45. After considering the decimal placement, what is Charlie’s final answer?

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Answer 1

0.09×0.05= 0.0045

Explanation:

when multiplying decimal numbers the final answer will have a number of decimal points equal to the sum of decimal points of the numbers that were multiplied. eg, 0.09 has 2 dp and 0.05 has 2dp. 2+2=4. The answer will have 4dp.