## Primary 6 Concepts

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## Primary 5 Concepts

###### Quantity and value involving extra quantity and total diff in value (Example 1)

This concept trains the students’ ability to solve questions comparing differences between the quantity model and the value model.

###### Quantity and value involving extra quantity and total diff in value (Example 2)

This concept trains the students’ ability to solve questions comparing differences between the quantity model and the value model.

###### How to solve simultaneous statements?

Simultaneous statements were first introduced in Primary 4. This example is a Primary 5 simultaneous question.

“Simultaneous concept” is arithmetic math. It is solving 2 unknowns with 2 number statements. This is a useful skill to acquire early in the year as it can be applied to solve subsequent problem sums.

###### Quantity and value involving total difference

This is an introductory question to that demonstrates how problem sums involving both quantity and value can be tested.

###### Quantity External Transfer using model

The concept of external transfer in problem-solving. There are two types of transfers: internal and external. Internal transfer deals with the transfer of values between entities within the problem, such as “John gave Peter \$30.” External transfer, on the other hand, involves the transfer of values outside of the entities in the problem, such as “John paid \$30 for a bag.” Understanding the difference between these two types of transfers is crucial in solving problem sums effectively.

###### Quantity Internal Transfer with Scenarios

The Quantity Internal Transfer concept deals with problem-solving involving the transfer of values within the entities in the question. An example of this would be “John gives 20 stamps to Peter.” In this video example, we have added various scenarios to challenge our students and encourage them to think deeply and logically.

###### Quantity Internal Transfer using model

The concept of Internal transfer in problem-solving. There are two types of transfers: internal and external. Internal transfer deals with the transfer of values between entities within the problem, such as “John gave Peter \$30.” External transfer, on the other hand, involves the transfer of values outside of the entities in the problem, such as “John paid \$30 for a bag.” Understanding the difference between these two types of transfers is crucial in solving problem sums effectively.

###### Quantity External Transfer using model (Example 1)

The concept of external transfer in problem-solving. There are two types of transfers: internal and external. Internal transfer deals with the transfer of values between entities within the problem, such as “John gave Peter \$30.” External transfer, on the other hand, involves the transfer of values outside of the entities in the problem, such as “John paid \$30 for a bag.” Understanding the difference between these two types of transfers is crucial in solving problem sums effectively.

###### Quantity External Transfer using model (Example 2)

The concept of external transfer in problem-solving. There are two types of transfers: internal and external. Internal transfer deals with the transfer of values between entities within the problem, such as “John gave Peter \$30.” External transfer, on the other hand, involves the transfer of values outside of the entities in the problem, such as “John paid \$30 for a bag.” Understanding the difference between these two types of transfers is crucial in solving problem sums effectively.

###### Common base in figures

How to teach students to solve ratio questions involving overlapping figures using the concept of Common base.

## Primary 4 Concepts

###### Stacking model

In Primary 3, students learned about the Comparison Model for comparing the values of two different items, such as “a jar has 3 more cookies than a can.”

Now, we would like to introduce a new method called the Stacking Model. This technique is used when comparing multiple items of the same type, for instance “3 jars have 5 more cookies than 3 cans.” The Stacking Model provides a visual representation and makes it easier to understand and compare multiple items.

###### Direct supposition

The Supposition concept can be a challenging one for students. At Model Math, we first introduce this idea in Primary 2 and gradually build upon it through repetition and more complex problems. This video example demonstrates the basics of the Supposition concept.

###### Supposition with penalty

The Supposition concept can be a challenging one for students. At Model Math, we first introduce this idea in Primary 2 and gradually build upon it through repetition and more complex problems. In Primary 4, we introduce Supposition with Penalty, which is a higher-level problem-solving technique that utilises the Supposition concept. It is common for students to need more than one lesson to fully grasp this concept, so we will be revisiting it in future lessons.

###### Shortage and surplus.

How to solve questions involving shortage and surplus using models.

Peter has some money. If he buys 1 book, he will have \$1.50 left. If he buys 2 similar books, he will be short of \$2.00. How much money does Peter have?

###### Simultaneous Concept

How to teach Primary 4 to solve problem sums using Simultaneous Concepts