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Multiplication and Division Videos 5 videos

Two-Step Equations Using Multiplication/Division
4115 Views

This video helps you tackle two-step equations with multiplication and division by using the opposite operation on each side of the equation. Defin...

Remainders
377 Views

Leftovers are good. Remainders are not.

Multiplication and Division of 1 Digit Numbers
679 Views

Just because some numbers are only a single digit, doesn't mean they don't still deserve a little love.

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Remainders 377 Views


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Description:

Leftovers are good. Remainders are not.

Language:
English Language

Transcript

00:00

Remainders, a la Shmoop. Paul Deen, Paula's little brother...

00:11

...is trying to follow in big sis' footsteps. However, every time he tries baking chocolate

00:18

tortes for his dinner guests... ...he ends up with left over dessert after

00:22

divvying the rest out evenly. He made the same number of tortes for each

00:27

of his first three dinner parties... ...and they were eaten by 4, 6 and 8 people

00:32

respectively. Each time, exactly 2 tortes went uneaten.

00:37

Which of the following expressions gives us a number that is evenly divisible by 4, 6

00:41

and 8? Here are the choices:

00:48

To Paul's abject horror, Paula steps in to save the day.

00:52

His sister got all the math smarts in the family, too. Don't you just hate that?

01:00

Paula starts by finding the least common multiple of 4, 6 and 8... which is 24.

01:12

Then she adds the remainder of 2 to get an x value of 26.

01:17

Next, she plugs her x value into each of the expressions until she finds another common

01:21

multiple of 4, 6 and 8.

01:25

"A" doesn't work because 34 isn't divisible by any of our three numbers

01:32

"B" -- Same story... 38 isn't divisible by any of the three.

01:44

"C" doesn't fit the bill either...42's only factor here is 6...

01:55

"D"...Nope - 46 hasn't a single factor either... Answer "E," however, works just perfectly.

02:16

26 plus 22 equals 48... ...and 48 is definitely a common multiple

02:21

of 4, 6 and 8. The Deen family is all about going "big"...

02:31

...so Paul decides to bake 48 tortes for his next dinner party.

02:36

That amount will be perfect for 4, 6 or 8 people...

02:39

...or if Paula opts to gorge herself on them all alone.

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