Three Significant Figures Three significant figures. If you approximate a number, what are the most significant 3 numbers that you can give. E.g. 0.74341.

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Presentation transcript:

Three Significant Figures Three significant figures. If you approximate a number, what are the most significant 3 numbers that you can give. E.g Geogebra (We’ll revise this at the end)

Points you’ve discovered: 1. Zeros at the start of the number do not count as significant figures. (E.g ) Three Significant Figures

Rounding Decimals to 3 s.f or bigger ? or bigger ? or bigger ? or bigger ? or bigger ? or bigger ? 18.1 No Yes

Rounding Decimals and Whole Numbers to 3 s.f or bigger ? or bigger ? or bigger ? 423 Yes No or bigger ? or bigger ? or bigger ? Yes No Yes

Write these numbers to 3 significant figures: