"Four Mixed Operations" PPT Courseware 2

Description

"Four Mixed Operations" PPT Courseware 2

teaching objectives

Experience the process of exploring the order of operations of the four mixed arithmetic operations, understand the role of parentheses in the four arithmetic mixed operations, and understand the connection and difference between the four arithmetic mixed operations and one-step calculation.

Preparatory exercises

1. State the order of operations of the four mixed operations

2. Tell the order of operations for the following questions and do the calculations orally:

50＋160÷40 128-144÷18+35

feedback exercise

Let’s talk about the order of operations of the following questions.

196-56÷4×6 16×50-36÷4

100-(62+540÷18)(40-15÷3)×7

fill in the blank:

1. Among the four mixed operations, there are only additions and subtractions or only multiplications and divisions, and the order of operations is ( ).

2. Among the four mixed operations, there are both addition, subtraction, multiplication and division, and the order of operations is ( ).

3. If there are parentheses in the calculation formula, ( ) should be calculated first, and then ( ).

Summary of this lesson

Through the study of this lesson, we know that: the order of operations of the three-step mixed operation is the same as the order of operations of the two-step mixed operation; if there are parentheses, the inside of the parentheses should be calculated first, and then the outside of the parentheses; both inside the parentheses Addition and subtraction are mixed operations of multiplication and division. Multiplication and division must be calculated first, and then addition and subtraction.

Keywords: Four Mixed Operations Courseware PPT, Western Normal University Edition Fourth Grade Mathematics Volume 2 PPT Courseware Download, Fourth Grade Mathematics Slide Courseware Download, Four Mixed Operations PPT Courseware Download, .PPT format

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File Info

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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