"Commutative and Associative Laws of Addition" Operational Law PPT Courseware

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"Commutative and Associative Laws of Addition" Operational Law PPT Courseware

When two numbers are added, the positions of the addends are swapped, and the sum remains unchanged. This is called the commutative law of addition.

Can you represent the commutative property of addition in a way you like?

A’s number + B’s number = B’s number + A’s number

I will use letters to represent a+b=b+a

Add the first two numbers first, or add the last two numbers first, and the sum remains unchanged. This is called the additive associativity law.

1. What arithmetic laws are used in the following equations?

38+27=27+38 ( )

61+48+32=61+(48+32)( )

(54+227)+73=54+(227+73) ( )

88+315+12=315+(88+12) ( )

2. Fill it in: Please fill in the appropriate ones in the brackets below.

96+35＝35+( )

204+57＝( )+204

(45+36)+64＝45+（　+　）

560+(140+70)＝(560+)+( )

Let’s summarize:

Add the first two numbers first, or add the last two numbers first, and the sum remains unchanged. This is called the additive associativity law.

If the letters a, b, c are used to represent three addends, it can be written as:

(a+b)+c＝a+(b+c)

What is the difference between the commutative law of addition and the associative law of addition?

The commutative law of addition can change the position of the addends, and the associative law of addition can change the order of operations.

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For more information about the PPT courseware "Commutative and Associative Laws of Operational Laws of Addition", please click the "Commutative and Associative Laws of Operational Laws of Addition" ppt tag.

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"Commutative and Associative Laws of Addition" Operational Law PPT Courseware 2:

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Update Time: 2024-09-05

This template belongs to Mathematics courseware Jiangsu Education Edition Fourth Grade Mathematics Volume 2 industry PPT template

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