Arithmetic Grade Five

Lesson One Hundred and Eleven: Whole-Fraction Division I

Here's another little candy bar story to help you understand division with fractions: 


	Let's say that you have three candy bars and
	that you want to divide each one into five
	pieces. How many pieces will you wind up with?

	In other words, you want to divide three candy
	bars into five pieces each. Each piece will be
	one-fifth of a candy bar. 

	We can write this as a division problem like this:

	3 ÷ 1/5 =
Of course, the answer is 15 pieces.

Here we review the procedure used to calculate the answer to a fraction division problem. 


	PROBLEM: 7 ÷ 1/8 =

	STEP ONE: Flip the second fraction and change 
		  the operation to multiplication. (7 x 8/1 = )	

	STEP TWO: Multiply. (7 x 8/1 = 56)
Here's another example: 

	PROBLEM: 10 ÷ 1/10 =

	STEP ONE: Flip the second fraction and change 
		  the operation to multiplication. (10 x 10/1 = )	

	STEP TWO: Multiply. (10 x 10/1 = 100)

Now you get to try a few.

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