ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Playlist Fractions and Decimals 14 videos

1
Pre-Algebra: Adding and Subtracting Fractions and Decimals
6153 Views

Worried about adding and subtracting fractions? Never fear. It's so easy that it will only take up a fraction of your time: just use multiplication...

2
Converting Decimals
1956 Views

This video explains how to convert between decimals, percents, and fractions. All three of these languages are just different ways of showing parts...

See All

Multiplying Fractions and Mixed Numbers Example 4903 Views


Share It!


Description:

Language:
English Language

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

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

Related Videos

Simplifying Radicals
9741 Views

We don't like knocking people down to size, but we do like simplifying radicals. Join us?

Arithmetic Math
2251 Views

If fleeing criminals always fled the scene of the crime at perfect right angles, it would be much easier to determine their whereabouts. Fortunatel...

Basics of Game Theory
882 Views

Okay, so this probably isn't going to help you master Pokemon Go, but game theory can be applied to all sorts of situations. Even stomping your old...

Calculate Measures of Central Tendency for a Data Set Manually
862 Views

Today's video is about calculating central tendency. We'll lay out outliers and make means...meaningful.