Measurements are reported in significant figures, Includes all digits that can be known accurately plus a last estimated digit.
Significant figures rules
Non-zero digits are always significant.
Any zeros between two significant digits are significant.
A final zero or trailing zeros in the DECIMAL portion are significant.
Ex. How many significant figures in 0.00204
Ex. How many significant figures in 12345.6
Ex. How many significant figures in 82,000
Kelvin to Celsius
Celsius to Kelvin
How to find density
How to find mass
How to find volume
Significant figures (addition and subtraction)
When adding or subtraction significant figures the answer can have no more digits to the right of the decimal point than are contained in the measurement with the least number of digits to the right of the decimal point.
Ex. 0.0024 + 0.624
Ex. 612.315 + 214.83
Ex. 43.21 - 56.789
Significant figures (multiplication and division)
The answer when multiplying or dividing must contain no more significant figures than the measurement with the least number of significant figures.
Ex. 314 x 72
Ex. 70.02 ÷ 12.34
Ex. 18.7 ÷ 2.3
A method in which scientists easily handle very large numbers and very small numbers.
Scientific Notation Rules
1. Exactly one non-zero digit is placed in front of the decimal point. 2. The exponent is equal to the number of times the decimal must be moved to achieve the first rule.