Significant Figures There are three rules on determining how many significant figures are in a number: Non-zero digits are always significant. Any zeros between two significant digits are significant. A final zero or trailing zeros in the decimal portion ONLY are significant. Identify how many significant figures are in each number AND circle the estimated number. 340 0.00004 340 0.45 4.004 1,000,000 0.630 320 34, 004 1.0010 10 47,000.03 20 5 25.0 200.4 31.0 35.002 340.600 90 7400 5000 2000 0.0300 43.0 4050 45.0 54.1 0.003 4 67.004 98.0 3.00 330 35.02 0.00030 0.005 6.001 60.0 3.40 30, 001 200 0.000403 20.4 380 0.02000 3 909 30.45 4.0 1000 0.0009 17.00 0.20000 0.03000 2.5400 0.03004 4030 80 2.02005 5003 4005 23.4 99.0 0.00040 8.00 58.005 400.500 0.000 0.004 34.002 45.03 34.00 99.2 90.03 45.45 400 8.40 202 3506 0.0303 550 2.0030 80 402.2 0.0400 45.0 20.03 0.00450 0.40 For each number write the number of significant digits in the number and identify which one is the estimated number. Number 1. 2300 Estimated of 2. 0.250 Number Number Sig Figs 3. 100
Significant Figures There are three rules on determining how many significant figures are in a number: Non-zero digits are always significant. Any zeros between two significant digits are significant. A final zero or trailing zeros in the decimal portion ONLY are significant. Identify how many significant figures are in each number AND circle the estimated number. 340 0.45 0.630 1.0010 20 200.4 340.600 5000 43.0 54.1 67.004 330 0.005 3.40 0.000403 0.02000 30.45 0.0009 0.03000 4030 5003 99.0 58.005 0.004 34.00 45.45 202 550 402.2 45.0 0.00450 0.00004 4.004 320 10 5 31.0 90 2000 4050 0.003 98.0 35.02 6.001 30, 001 20.4 3 4.0 17.00 2.5400 80 4005 0.00040 400.500 34.002 99.2 400 3506 2.0030 0.0400 20.03 0.40 340 1,000,000 34, 004 47,000.03 25.0 35.002 7400 0.0300 45.0 4 3.00 0.00030 60.0 200 380 909 1000 0.20000 0.03004 2.02005 23.4 8.00 0.000 45.03 90.03 8.40 0.0303 80 For each number write the number of significant digits in the number and identify which one is the estimated number. Number Estimated of Number Number Sig Figs 1. 2300 2. 0.250 3. 100
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