Significant Digits

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Significant Digits

1. Non-zero digits are significant (1,2,3,4,5,6,7,8, and 9). How many are significant?

.01426

33.817

1,418,235

.7

9.6

46.1

.23

.4438714

48.72

113

6114

2

2. Zeros that fall in-between non-zero digits are significant. How many?

30.17 1060.5 .32000701

1004.6 8,000.7 1.0001

3,000.0001 8604

5,703.0

3. Zeros to the right of the decimal point, but to the left of a non-zero digit are not significant; they serve only to locate the decimal point. How many?

.0051 .01

.0666

.000004 .03808 .000465

.00205 .000005337 .000000099

4. This zero is never significant; it helps you to locate the decimal point. How many?

0.0415

0.8001

0.000606

5. Zeros to the right of a non-zero digit and also to the right of the decimal point are significant. How many?

1.200 9.100 1200.0 1.6060

10.0 0.0230

70.0 1,000.0

0.320 0.00450

.040 6,501.003

6. Zeros to the left of the decimal point (it is understood) and to the right of a non-zero digit are never significant; They serve only to locate the decimal point. How many?

3,200 3,000,000 8,000,850

400 789,770

7,000

10 300,600 3,000,010

Caution!! If you put a decimal point after these zeros, you are saying that all of the zeros

are significant digits!! How many now?

1000.

15,000.

970,000.

0.04

5015.00

.005600

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