Significant Figures Practice
Quantitative Skills · Numbers
New numbers every set.
Choose one skill for 8 questions, or Mixed review for 12. Every set has new numbers.
No timer. Use scratch paper and a calculator. The rules from the lesson are below.
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Reference
Significant figure rules
- Nonzero digits always count.
- Zeros between nonzero digits always count: 4007 m has 4.
- Leading zeros never count: 0.0052 g has 2.
- Zeros at the end count only when there is a decimal point: 2.50 g has 3, but 2500 g has 2.
- In scientific notation, count only the digits of the first number: 2.500 × 103 g has 4.
- Rounding: if the first digit you drop is 5 or more, round the last kept digit up.
- Multiplying or dividing: keep the fewest significant figures.
- Adding or subtracting: keep the fewest decimal places.
Practice for the Significant Figures lesson in Quantitative Skills. Original ZornScience questions.
About this activity
Count significant figures, round, and use the rules for multiplying, dividing, adding and subtracting. Every set has new numbers, and each answer gets feedback right away.
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- Significant FiguresQuantitative Skills