145.75+2.3*10^-1
145.75+0.23
145.98
As 2.3*10^-1 has two significant figures, our answer must have two significant figures
145.98
150
As the 5.98 rounds up to the nearest significant figure
1.5*10^2
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0.0006584 in Scientific Notation = 6.584 x 10-4
1. All non-zero digits are always significant. 2. Zeroes between other significant figures are significant. 3. Trailing zeroes without a decimal point are not significant. 4. Trailing zeroes after a decimal point are significant. 5. Leading zeroes that come before a non-zero number are not significant. 1. 2598 has four significant figures. 2. 25005 has five significant figures. 3. 160 has two significant figures. 4. 45.800 has five significant figures. 5. 00.00589 has three significant figures.
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7.07 to 3 significant figures
2