The rules of significant digits and practice examples
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | Any zeros to the right of a decimal are significant. Ex: 8.00
Any zeros to the right of a non-zero number in a decimal. Ex: 1.80
Any zeros between non-zeros are significant Ex: 3,001
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| show | Any zero to the left of a whole number is NOT significant. Ex: 2,340,000
Any zero between a decimal and non-zero numbers in a decimal are NOT significant. Ex: 6.007
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| show | Significant
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| What is the rule of rounding to the appropriate significant digit when adding or subtracting? | show 🗑
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| show | Round the same number of significant digits as the LEAST precise number in the problem. EX: 20 ÷ 0.06 (Solve and round to 1 significant digit- ones place) = 1
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| show | 1
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| show | 4
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| Determine the number of significant digits: 230 | show 🗑
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| show | 5
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| Determine the number of significant digits: 0.003405 | show 🗑
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| Determine the number of significant digits: 6,001,020 | show 🗑
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| show | 4
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| Determine the number of significant digits: 800 | show 🗑
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| show | 3
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| show | 5
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| show | 5
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| show | 764
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| Solve the problem by rounding to the correct number of significant digits: 0.82 x 1.5 | show 🗑
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| Solve the problem by rounding to the correct number of significant digits: 320 x 0.45 | show 🗑
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| show | 0.079
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| show | 1.584 (answer in correct number of significant digits- no rounding needed)
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| Solve the problem by rounding to the correct number of significant digits: 15,399.6 ÷ 1,230 | show 🗑
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| Solve the problem by rounding to the correct number of significant digits: 23,892 + 2,120 | show 🗑
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Created by:
Ms.Clinton