"Mixed Operations of Addition and Subtraction of Decimals" Addition and Subtraction of Decimals PPT Courseware 3

Description

"Mixed Operations of Addition and Subtraction of Decimals" Addition and Subtraction of Decimals PPT Courseware 3

teaching objectives:

1. Let students correctly calculate decimal addition and subtraction, and master the order of mixed decimal addition and subtraction operations.

2. Be able to use different methods to solve the same problem and cultivate students' divergent thinking.

3. Cultivate students’ innovative spirit and awareness of seeking differences.

Key points and difficulties: Correct calculation of mixed decimal addition and subtraction operations.

List of Tour Stage Information

Date Stage Mileage/Kilometer

26th Section 1 39.5

27th Section 2 98.8

28th Paragraph 3 165

29th Section 4 80.7

30th Section 5 99.4

Total mileage 483.4

Subtract the distance you have ridden from the total mileage to get the distance you still have to ride.

483.4-(39.5+98.8)=483.4-138.3=345.1 (km)

The distance left to ride is the sum of the remaining 3 sections.

165+80.7+99.4=245.7+99.4=345.1 (km)

Class summary:

The order of mixed decimal addition and subtraction operations is the same as that of mixed integer addition and subtraction operations.

Class exercises:

(1), you can count. (Exercise 17, Question 2)

(2) Question 3 of Exercise 17 on page 101 of the textbook.

(3) Calculate the following questions.

12.95+3.84+6.16

72.36-(5.87+22.36)

8.41+5.45+4.55+1.59

29.88-13.33-6.67

(4) A sugar factory produced 68.75 tons of white sugar in January, 7.25 tons less than in February. March was 41.5 tons less than the total in January and February. How many tons of sugar were produced in March?

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For more information about the PPT courseware "Addition and subtraction of decimals, mixed operations of addition and subtraction of decimals", please click the Addition and subtraction of decimals ppt mixed operations of addition and subtraction of decimals ppt tag.

"Mixed Operations of Addition and Subtraction of Decimals" Addition and Subtraction of Decimals PPT Courseware 2:

"Mixed Operations of Addition and Subtraction of Decimals" PPT Courseware for Addition and Subtraction of Decimals 2 Let's see who can calculate correctly and quickly: 0.4+8.7＝ 4.5 +3.6 ＝ 0.28 ＋0.54 ＝ 1.4 -0.9 ＝ 7.1-3.5 ＝ 5-2.7 ＝ ... ... ... Today's second stage of the competition has ended...

"Mixed Operations of Addition and Subtraction of Decimals" Addition and subtraction of decimals PPT courseware:

"Mixed Operations of Addition and Subtraction of Decimals" Addition and subtraction of decimals PPT courseware 1. See who can calculate faster 0.2+0.3 3.5+2.4 8.7-4.5 1-0.6 0.9-0.5 2.3+5.4 4.9+1 8.6-5.5 0.7+0.8 6.7+1.1 5+6.5 9.7-7 2. First, let’s talk about the operation of the following questions..

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Update Time: 2024-10-05

This template belongs to Mathematics courseware People's Education Press fourth grade mathematics volume 2 industry PPT template

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