Yes, when using significant figures (sig figs), you round numbers to reflect the correct precision of the measurement. The final answer should not have more significant figures than the least precise measurement used in the calculation. Rounding is typically done based on the value of the digit immediately following the last significant figure.
45.0
0.0005482
143.4
2.0
1050 rounded to 2 sig figs is 1000, and to 1 sig figs is 1000.
To one sig fig, 300 To two sig figs, 310 To three sig figs, 314
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
5 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.
13.00 has 4 sig figs.