This math skill teaches how to approximate the multiplication of a number by Pi. Recognize that Pi is slightly over 3, use 3 as a base for a rough estimate, and adjust by considering more precise decimal places of Pi for better accuracy.
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Approximating multiplication by Pi
Test your understanding of approximating multiplication by Pi by practicing it! Work through the below exercises to use it in practice.
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What is 8 times pi, approximately
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Pi is an irrational number, and its decimals go on forever, but we can approximate by knowing that it's a bit more than 3
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So, 8 times 3 is 24. That's a decent first approximation, but Pi is a bit more than 3
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8, times the zero point 1 4 1 5 9 part would be approximately 1
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So a better approximation for 8 Pi would be around 25.