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In the last video, we divided
100 into 99.061, and we did it
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the manual way.
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We did it the long
division way.
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In this video, I just want to
show you a quick shortcut
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because we're dividing something
by a power of ten.
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If I have 99.061, if I multiply
by a power of ten,
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I'm going to make the
number bigger.
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Every time I multiply by 10, the
decimal would shift to the
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right by one spot.
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So we could say, 99.061
times 10 is going
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to be equal to 990.61.
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Notice we just moved
the decimal over to
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the right by one.
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If I were to do-- I'll just
arbitrarily switch colors--
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99.061 divided by 10, we're
going to shift the decimal in
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the other direction.
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This is going to be 9.9061.
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So when we divide by 100, we're
dividing by 10 twice.
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We're shifting to
the left twice.
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So if we start with 99.061
divided by 100-- let me just
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write it like this.
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We've already written
the problem.
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If we want to divide this by
100, moving it one spot to the
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left will divide it by 10, and
then moving another spot to
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the left will divide
it by 10 again.
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So 99.061 divided by 100 is
going to be equal to 0.99061.
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We're just going to shift the
decimal to the left by two.
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And we might want to put a
leading zero here, just so it
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makes it a little bit
easier to read.
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