Starter quiz
- In the number 56 072, the 7 is the ______ significant figure.
- 'fourth' ✓
- Select the numbers that have 3 as the third significant figure.
- 538.92
- 723.91 ✓
- 10 384 ✓
- 500 039
- 503 090 ✓
-
- Select all the numbers which have zeros that are not needed to preserve the place value of other digits.
- 700.00700 ✓
- 7007.007
- 70 070.070 ✓
- 770 000
- 7 070 000.07
-
- Match each number to the correct statement.
- 750⇔5 is the second significant figure ✓
- 10 756⇔5 is the fourth significant figure ✓
- 500 167⇔5 is the first significant figure ✓
- 1 000 567⇔5 is the fifth significant figure ✓
- 6 051 007⇔5 is the third significant figure ✓
- Round 9452 to 2 significant figures.
- '9500' ✓
- Round 8096.564 to 3 significant figures.
- '8100' ✓
Exit quiz
- The first ______ figure is the first non-zero digit in a number.
- 'significant' ✓
- Match each number to the correct statement.
- 0.05053⇔5 is the first significant figure ✓
- 0.25032⇔2 is the first significant figure ✓
- 0.004602⇔4 is the first significant figure ✓
- 7.0644⇔7 is the first significant figure ✓
- 0.0003945⇔3 is the first significant figure ✓
- Round 0.00754 to 2 significant figures.
- '0.0075' ✓
- Round 0.006083 to 3 significant figures.
- '0.00608' ✓
- Round 0.0495 to 2 significant figures.
- '0.050' ✓
- Round 0.03098 to 3 significant figures.
- '0.0310' ✓
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Numbers bigger than 1 with decimals places can be rounded to significant figures.
- When working with numbers smaller than one it is important to carefully identify the first significant figure.
- Once the first significant figure is identified you can find any significant figure.
- It is important to know when zeros are and are not significant.
Common misconception
Assuming all zero digits are not significant.
Designing questions that contain zero digits in a variety of positions.
Keywords
Significant figure - Significant figures are the digits in a number that contribute to the accuracy of the number. The first significant figure is the first non-zero digit.
Round - To change a number into another number that is approximately the same value but is easier to work with. E.g. round 561 to the nearest 10 is 560.
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