You round when the digit you are considering is 5 or greater, you round up the preceding digit, while if it's less than 5, you leave the preceding digit unchanged. When determining significant figures, you round your final result to match the least number of significant figures in any of the numbers used in your calculations. Always round only at the end of calculations to maintain accuracy throughout your work.
45.0
2.0
0.0005482
143.4
1050 rounded to 2 sig figs is 1000, and to 1 sig figs is 1000.
1.26 is three sig figs and 6> 5, so you round up to 1.3 which is 2 sig figs
two sig figs
there are 3 sig figs. 4, 0, and 5 are the sig figs
When adding or subtracting, follow these steps to find a sig figs answer: 1) Add/Subtract numbers regularly. 2) Determine which measurement has the least decimal places. 3) Round final answer to the same number of decimal places. When multiplying or dividing, follow these: 1) Count the number of sig figs in the numbers you are multiplying/dividing. 2) Multiply/Divide regularly. 3) Round final answer to the same number of sig figs as the measurement with the fewest sig figs.
5 sig figs
There are four sig figs in 1.032
There are four sig figs in 2.905.