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Fractions Videos 8 videos
Number Sense: Drill Set 2, Problem 1. Which of the following is equivalent?
Multiplying Fractions and Mixed Numbers Example 4903 Views
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Transcript
- 00:00
Thank you We sneak And here's your shmoop du jour
- 00:06
Which of the following is equivalent to sixty four times
- 00:09
one Thirty second to the fourth time's one sixteen to
- 00:13
the fifth And here the potential answers Okay so even
- 00:20
if we didn't recognize that each of these numbers is
Full Transcript
- 00:22
a multiple of to we could have glanced at the
- 00:25
answer choices and glean that fact real fast In these
- 00:28
kinds of questions were almost always being asked to convert
- 00:31
to powers of two in this questions No exception So
- 00:35
we just convert everything to powers of two and rewrite
- 00:37
it It will hurt a bit but the hard work
- 00:39
is good for us Yeah feel the burn sixty for
- 00:43
is two times two times two times two times two
- 00:46
times two or two to the sixth Thirty two is
- 00:49
to the fifth and sixteen is two to fourth Problem
- 00:52
now looks like this Note also that when we have
- 00:57
exponents in the denominator we can rewrite them is negative
- 01:00
numbers so let's rewrite the problem to account for the
- 01:03
fractions Get rid of them like their unwanted body fat
- 01:06
And now we have a fully re written problem that
- 01:08
looks like this First we multiply the exponents that are
- 01:13
being raised to another power like this and once we
- 01:17
do that we can add and subtract the exponents like
- 01:20
this six minus twenty minus twenty which is negative thirty
- 01:24
four and woot There we go it's answer Be hope 00:01:28.581 --> [endTime] you remembered to stretch first
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