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Multiplication and Division Videos 5 videos
This video helps you tackle two-step equations with multiplication and division by using the opposite operation on each side of the equation. Defin...
Just because some numbers are only a single digit, doesn't mean they don't still deserve a little love.
Long Division 3677 Views
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Description:
Have plenty of scratch paper on hand before starting one of these problems. We’re not kidding when we say "long" division.
Transcript
- 00:00
Long division, a la Shmoop. In recent years, many species have been placed
- 00:09
on the endangered list. One of these species is the Underwear Fairy.
- 00:15
The underwear they depend on to survive has been depleted by the expanding Underwear Troll
- 00:20
population.
- 00:21
What used to be a plentiful bounty is now just a cool draft.
Full Transcript
- 00:25
But wait -- the fairies have happened upon a pile of wild underwear.
- 00:29
Looks like there are 333 pairs of underwear to split evenly among 9 fairies.
- 00:35
Just how many pieces of underwear will each fairy get?
- 00:39
To set up the problem, draw your division box.
- 00:45
The dividend, or what's getting split up, goes inside the box. This is the 333 pairs
- 00:51
of underwear.
- 00:53
For the divisor, think outside the box. This is what you're dividing by.
- 01:05
Next decide if the first digit of the dividend can be divided by the divisor, or if 9 can
- 01:12
go into 3 at least once.
- 01:15
No?
- 01:16
Okay, so now see if 9 will go into the first two digits, or 33? Yes it can!
- 01:23
That means our quotient, or answer, will start above the second digit, or the tens place.
- 01:29
We need to find out "9 times what equals 33".
- 01:31
If you remember your times tables, you'll remember that 9 times 3 = 27, which is close
- 01:34
without going over.
- 01:35
Subtract 27 from 33 and that leaves us with a remainder of 6.
- 01:41
Bring down the last digit and we get 63.
- 01:44
Does 9 go into 63? Why yes it does. How many times?
- 01:49
7 times exactly in fact, which we write above the ones place.
- 01:53
7 times 9 is 63. 63 minus 63 is zero, so we have no remainder.
- 02:02
Yay, our answer is 37 pieces of underwear per fairy!
- 02:07
Even better, there's no remainder so the fairies won't wand-beam each other to death over the
- 02:11
leftover underwear.
- 02:13
That's a terrible way
- 02:33
to go.
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