1. Word cloud

120 seconds

How do you define significant figures?

2. Slide

60 seconds

Significant figures are the digits in a number that are used to express its precision. They are used to indicate how accurate a number is, often in scientific calculations. The last digit of a number is the least significant figure: it is the most likely to be incorrect.

Significant Figures

3. Slide

60 seconds

Significant figures are digits of a number that represent meaningful information about the precision of a measurement. They include all digits that are certain and the first digit that is uncertain. Leading zeroes are not significant because they are merely placeholders to locate the decimal point. Trailing zeroes are significant if the number contains a decimal point. Rounding off is a method used to reduce a number with more significant figures than necessary to the appropriate number of significant figures.

Concepts:

4. Poll

60 seconds

What is your opinion on the importance of significant figures in math?

- They are essential for doing math accurately and efficiently.
- They are a good tool to have, but not always necessary.
- They don't really matter in the grand scheme of things.

5. Slide

60 seconds

The number of significant figures is not always equal to the number of digits in a number. For example, the number 0.0050 has three significant figures even though it has five digits. The number of significant figures in a number can be used to determine the accuracy of the number. For example, if a measurement is reported as 10.2 cm, it is more accurate than if it is reported as 10 cm because it has three significant figures instead of two. A zero in the middle of a number is significant, but a zero at the end of a number is not. For example, the number 0.030 has two significant figures, but the number 30.0 has only one.

Did you know?

6. Open question

300 seconds

How many significant figures does this number have? 0.0085

7. Open question

300 seconds

12.000 write down the number of significant figures.

8. Personalised Feedback

360 seconds

0.00153100

9. Drawings

330 seconds

Draw a broccoli wearing sneakers exercising at a gym

10. Open question

300 seconds

10.007

11. Open question

300 seconds

Round off this number. 1.239 to 3 significant figures.

12. Personalised Feedback

360 seconds

Round off this number

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