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## Award-winning PDF software     ### Instructions and Help about Where Form 2220 Subtracting

Okay addition and subtraction with scientific notation as you'll probably remember each number that's written in scientific notation has two parts this which we can call the coefficient or the mantissa and this 10 raised to an exponent we can just call the power when we do addition and subtraction problems with scientific notation we hope so hard that the powers are the same because it makes the problem much easier but if they're not the same it isn't the end of the world I'll show you how to solve those problems too let's look at this it's an addition problem in this case the first thing I always want to look at is the powers and since they're the same ten to the fifth in both cases I'm set here's all I have to do I take the coefficients and since this is addition I add them together three point seven six nine plus four point two one these two guys and I do that math and now since the powers were the same all I do is bring this power down 10 to the fifth and use it my final answer simple is up so my answer is seven point nine seven nine times ten to the fifth all I have to do is do the math and then I just bring down 10 raised to the exponent here's a subtraction problem I'm not even go through the whole thing because I think it's so easy I just look at the powers here they're the same so all I have to do is the subtraction 8.14 minus 2.01 there's the answer and then I take 10 to the negative second I pull it down here and reuse it in my final answer I'm done so you may be...