Key learning points

1. The first non-zero digit of a number is the first significant figure.
2. Once the first significant figure is identified you can find any significant figure.
3. It is important to know when zeros are and are not significant when rounding integers.
4. Integers can be rounded to any number of significant figures.

Common misconception

Keywords

• Significant figures - 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.