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Showing posts with label Measurement Concept. Show all posts
Showing posts with label Measurement Concept. Show all posts

Friday, February 11, 2011

Division

So what comes after Multiplication... You got it, Division! On Thursday in class we began talking about Division....

Quotient: the result of division (the answer)

Dividend: the number divided

Divisor: does the dividing


Division of Whole Numbers:
-For any whole numbers r and s, with s cannot = 0, the quotient of r divided by s, written r/s, is the whole number k, if it exists, such that r = s x k.


-Sharing (Partitive) Concept

Suppose you have 9 basketballs, which you want to divide equally among 3 people. How many basketballs would each person receive?

Solution: The answer can be determined by separating the basketballs into 3 equivalent sets. The following figure shows 9 balls divided into 3 groups and illustrates 9/3. The divisor 3 indicates the number of people.



Person 1



Person 2



Person 3

 © CKSinfo.com

This method is easy for kids to understand, because you can actually see the total number of basketballs being divided evenly.

-Measurement (Subtractive) Concept
Suppose you have 10 basketballs and want to give 3 tennis balls to as many people as possible. How many people would receive tennis balls?

Solution: The answer can be determined by subtracting, or measuring off, as many sets of 2 as possible. The following group of 10 basketballs shows the result of this measuring process and illustrates 10/2. The divisor 2 is the number of balls in each group, and the quotient 5 is the number of groups.









 © CKSinfo.com

This method of measurement (subtractive) concept is a different way to look at dividing. It allows the student to use something they are more comfortable with. Another perspective helps them understand division in a different way.