| Category | Format | Size |
|---|---|---|
| Western Normal University Edition Fourth Grade Mathematics Volume 2 | pptx | 6 MB |
"Commutative and Associative Laws of Multiplication" The relationship between multiplication and division and the law of multiplication PPT courseware 2
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"Commutative and Associative Laws of Multiplication" The relationship between multiplication and division and the law of multiplication PPT courseware 2
commutative law of multiplication
Can you describe the commutative law of multiplication in your own words, following the commutative law of addition?
When two numbers are added, the positions of the two addends are swapped, and the sum remains unchanged. This is the commutative law of addition.
a + b = b + a
When two factors are multiplied together, the positions of the two factors are exchanged, and the product remains unchanged. This is the commutative law of multiplication.
Can you express the commutative property of multiplication in your preferred way?
The number of A × the number of B = the number of B × the number of A
a × b = b × a
Observing the above equation, did you find any patterns?
Can you imitate the associative law of addition and describe the associative law of multiplication in your own words?
To add three numbers, add the first two numbers first, or add the last two numbers first, and the sum remains unchanged. This is the additive associative law.
When multiplying three numbers, multiply the first two numbers first, or multiply the last two numbers first, and their product remains unchanged. This is the associative law of multiplication.
judge.
(1) Any number multiplied by 0 gets 0. So adding any number to 0 will result in 0. ( )
(2) 1+1＝1×1 ( )
(3) 134 + 196 = 134 + 200 + 4 ( )
(4) The operation to find the remaining part is called subtraction. ( )
How did you learn?
Today we learned the commutative and associative properties of multiplication. How do the students master them? Students should write down the formulas of the two operation laws we learned in this lesson in their exercise books, and give examples.
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For more information about the PPT courseware "The Commutative Law of Multiplication and the Associative Law of Multiplication and Division, the Relationship between Multiplication and Division, and the Law of Multiplication", please click the "Commutative Law of Multiplication and Associative Law ppt, The Relationship between Multiplication and Division, and the Law of Multiplication ppt" tag.
"Commutative and Associative Laws of Multiplication" Operational Law PPT Courseware:
"Commutative and Associative Laws of Multiplication" PPT courseware. Can you imitate the commutative law of addition and describe the commutative law of multiplication in your own language? Two addends exchange places, and the sum does not change. This is the commutative law of addition. a + b = b + a The two multipliers exchange places and the product remains unchanged..
"Commutative and Associative Laws of Multiplication" PPT courseware on the relationship between multiplication and division and the law of multiplication:
"Commutative and Associative Laws of Multiplication" PPT courseware on the relationship between multiplication and division and the laws of multiplication. Learning objectives: 1. Understand and master the meaning of the commutative and associative laws of multiplication. 2. Be able to use the commutative law and associative law of multiplication. ... ... ... Self-study guidance: 1. Self-study content..
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Update Time: 2024-07-02
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