WEBVTT
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Now let me introduce the bar model method,
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or simply called the model method in
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Singapore. The model method in Singapore
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refers to a particular mathematical
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problem-solving approach by using
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rectangular bars as pictorial representations
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of the quantities in the relationships
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between quantities in problem situations.
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So it is in CPA, the P, a pictorial
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representation. Different model methods
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can be used to solve different types of
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mathematics problems. There are five
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models of model methods. First is the
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part-part-whole model. The second is a
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comparison model. The third is a
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multiplication model. The fourth is
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participation/rate model. Then the fifth
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is a combination model, the basic
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part-part-whole model and comparison model.
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Dr. Bokhove will explain some research and
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theoretical background about the bar
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model method. Here I will show you two
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concrete examples: one for the part-part-whole
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model and the other comparison model.
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So let's look at the following examples.
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Question 1
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so it's about a part-part-whole model
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the problem is: Class A has 37 students
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Class B has 30 students. What is the total
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number of students in the two classes?
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So using rectangular bars we will draw this way
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first is Class A is 37
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then Class B is 30, so the total is
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addition: 37 plus 30 that's 67, so that's
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the answer.
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Now let's look at example two. So the question
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is as follows:
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Class A has 67 students. Class B has 37
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students. How many more students does
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Class A have than Class B? So we use a
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longer rectangular bar to represent the
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quantity of Class A. Then we use a
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shorter rectangular bar to represent
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some quantity, that is the number of
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students in Class B. Then we use
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subtraction to get to the answer. That is
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67 minus 30 equals 37. So that is
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understandable for almost every student.