I'm currently re-teaching my self maths to get into physics as i sucked at maths in school but now im older I feel like actually learning it ! So i'm on a website which gave me a test quiz i got them all correct bar one but it won't tell me the answer so ill show you the question and my answer see if you can help work out where i have miscalculated. Solve the following problem with correct numbers of significant digits: 2.1 * 5.2 - 1.45 / 0.02303 My workings: Rounded to lowest significant digits in the sum. So my answer was: 4.6 But thats incorrect. Any ideas where i went wrong in my steps?