 Okay, so how many significant figures are in the answers for each of the following? So in this one, you've got something that's got two significant figures and a number that's got three significant figures. So when you're multiplying the two numbers together, you're going to take the one with the least amount of sig figs, okay? So we've got to multiply 23 times 657 and that gives us 15111, okay? Of course, this has 1, 2, 3, 4, 5 significant figures, so you're going to have to reduce that to two significant figures, so you're going to have to put this in the scientific notation, okay? So the decimal point applied is there, so you're going to go 1, 2, 3, 4, so the actual answer is going to be 1.5 times 10 to the fourth. So when you're adding or subtracting for significant figures, you want to do the one that has the least amount after the decimal point. In this problem, we're adding two numbers together, so the first thing we want to do is take those two numbers and add them together and we get this number, 0.24121, okay? Well, that has 1, 2, 3, 4, 5 numbers after the decimal point. This one has 1, 2, 3, 4, 5, but this one has 1, 2, 3 numbers after the decimal point. So we're going to have to cut this one off right there, okay? So this one actually equals 0.241, okay? So that's the answer, okay? And again, with division, just like multiplication, you just do the one that has the least amount of sig figs. This one has 3, this one has 5, so your answer is going to be 3. In this case, you got 5.985, and if you go into three sig figs, you want to do these three, but 5 is the number that you need to start rounding up with, okay? So in actuality, this won't be 5.98, it's going to be 5.99.