Significant Figures Practice 2
10 problems · instant feedback · full explanations
Your answer can't be more precise than your data. Count sig figs, round at the end, and use scientific notation for extreme scales.
Q1.
How many significant figures are in 0.00450?
Multiple choice · Easy
Q2.
What is 3.2×10⁴ in ordinary notation?
Multiple choice · Easy
Q3.
A rectangle is 12.5 cm by 8.24 cm. What is its area with correct sig figs? (cm²)
Numerical answer (cm²) · Medium
Q4.
15.2 g + 3.45 g = ? Report with correct significant figures. (g)
Numerical answer (g) · Medium
Q5.
How many significant figures in 0.0821?
Multiple choice · Medium
Q6.
What is (2.0×10³)(1.5×10⁻²) in proper scientific notation?
Multiple choice · Hard
Q7.
You should round only the final answer, not intermediate steps.
True / False · Easy
Q8.
Counted quantities like '12 apples' limit significant figures like measurements do.
True / False · Medium
Q9.
How many significant figures are in Avogadro's number 6.022×10²³?
Multiple choice · Hard
Q10.
A 2.4 m distance is timed at 0.5 s. What is the speed with correct sig figs? (m/s)
Numerical answer (m/s) · Hard