"Law of Multiplication" PPT courseware on the relationship between multiplication and division and the law of multiplication

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"Law of Multiplication" PPT courseware on the relationship between multiplication and division and the law of multiplication

1. Fill in the blanks according to the laws of operation.

(1)165＋126＝126＋

(2) (316 + 73) + 127 = 316 + ( + )

Swap the positions of two factors and the product remains unchanged. This is called the commutative law of multiplication.

Multiply the first two numbers first, or multiply the last two numbers first, and the product remains unchanged. This is called the associative law of multiplication.

If the sum of two numbers is multiplied by the same number, you can multiply the two addends by the number, and then add the two products, and the result will remain unchanged. This is called the distributive law of multiplication.

Think about it:

In order to enrich the students' after-school life, the school plans to purchase 20 footballs and 20 basketballs each. Based on the information provided, what math questions can you ask?

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. ( )

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Update Time: 2024-09-08

This template belongs to Mathematics courseware Western Normal University Edition Fourth Grade Mathematics Volume 2 industry PPT template

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