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Authoritative PPT Summary
"Addition, Subtraction and Mixing" PPT courseware download, 18 pages in total.
Classroom introduction
The weather is nice on the weekend. Let's take the bus and go to the park.
New knowledge exploration
There were originally 67 people on the bus. How many people are there now?
First count 25 people, how many people are in the car:
67-25=42 (people)
Let’s count how many people there are now:
42+28=70 (person)
Comprehensive formula: 67-25+28=
Classroom training
56+34-20= 78-24+39=
There are 92 storybooks in the school library. The first grade borrowed 36 books and the second grade returned 24. How many are left?
92-36+24=80 (original)
summary
What knowledge have you learned in this class?
Addition and Subtraction Mixing
Calculation method for mixed addition and subtraction (without parentheses):
(1) Calculate from left to right.
(2) It can be calculated step by step or written as a vertical calculation.
Keywords: Free download of PPT courseware for mixed addition and subtraction, PPT download of addition and subtraction within 100, .PPT format;
For more information about the PPT courseware "Addition and subtraction within 100, mixed addition and subtraction", please click on the Addition and subtraction within 100 PPT, mixed addition and subtraction PPT tag.
"Mixed Operations of Addition and Subtraction with Parentheses" PPT courseware download:
"Mixed Operations of Addition and Subtraction with Parentheses" PPT courseware download, 17 pages in total. New Knowledge Exploration 72-(47+16) Read as: 72 minus the sum of 47 and 16. ( ) are called parentheses. Parentheses can change the order of operations. The origin of parentheses: About 400 years ago...
"Addition and Subtraction Mixing" PPT download:
"Addition, Subtraction and Mixing" PPT download, 18 pages in total. Review introduction Scenario introduction Observe carefully and use your own words to describe what is drawn on the picture. Explore new knowledge What does 432 represent in the calculation formula? How to read this equation? How many swans are there now? How should they be listed...
"Mixed Operations of Addition and Subtraction of Rational Numbers" Rational numbers and their operations PPT (Lesson 3):
"Mixed Operations of Addition and Subtraction of Rational Numbers" Rational Numbers and Their Operations PPT (Lesson 3) Part One Content: Learning Objectives 1. Master the skills of mixed operations of rational number addition and subtraction, and perform skilled operations. 2. Gain problem-solving skills through reflection on the process of solving simple practical problems.