This week, Group 1 got to make a DLO to explain how to work with significant figures in numbers on the DLO. Significant figures are the important digits in a number that show its precision. The resource helps you understand how to keep track of these digits when solving math problems.
The idea is that sometimes you need to show all the significant figures in a number, whether it has one, two, three, four, or five. Doing this makes it easier to work with the number correctly. For example, if you have the number 886,652, and you want to round it to different significant figures:
– To have only 1 significant figure, you look at the first digit and round the number to the nearest hundred thousand, so it becomes 900,000.
– To have 2 significant figures, you keep the first two digits, which are 88, and then round, making it 890,000.
– To have 3 significant figures, keep 888, and the number becomes 887,000.
One interesting fact I learnt was that if I shows these steps clearly, it is making it easier for students to understand how to identify and work with significant figures. Whilst also understanding how to do this is useful because it helps make measurements and calculations more accurate and consistent, especially in math.