"I exercise, I am healthy" PPT courseware 5

Description

"I exercise, I am healthy" PPT courseware 5

1. Situation introduction

The long diameter of a green turtle egg is 3.94 cm

Xiaohua: The length and diameter are about 3.9 cm

Xiao Ming: The length and diameter are about 4 cm

Why are the results said by Xiaohua and Xiaoming different?

The width and diameter of green turtle eggs is 2.04 cm

What is the approximate width and diameter of a green turtle egg?

What mathematical information do you know from the picture?

2. Cooperation and exploration

Why are the results said by Xiaohua and Xiaoming different?

How to find the approximate number of a decimal?

How is 3.94≈3.9 obtained?

How do you get 3.94≈4?

give it a try

Find the approximate number of the following decimals.

1. 4.47 0.087 (rounded to one decimal place)

2. 6.907 0.685 (rounded to two decimal places)

3. 9.542 3.099 (retain integers)

Think about it, how to find the approximate number of a decimal?

To find the approximate number of a decimal, you can use the rounding method.

If an integer is retained, it means that the accuracy is to one digit, and the first digit of the decimal part is omitted; if one decimal place is retained, it means that the accuracy is to tenths, and the second digit of the decimal part is omitted; if three decimal places are retained, it means that it is accurate. When reaching the percentile, omit the fourth digit of the decimal part...

3. Independent practice

1. Fill it out.

2. Continuously.

3. Find approximate numbers.

4. Choose one.

(1) The approximate value of a two-digit decimal is 6.4. This decimal cannot be ( )

① 6.35 ② 6.39 ③ 6.41 ④ 6.45

(2) A student's height to one decimal place is approximately equal to 1.7 meters. Then, his height expressed to two decimal places is ( ) meters at the lowest and ( ) meters at the highest.

① 1.74 ② 1.65

5. Use your brain to think about it.

A one-digit number whose approximate value is 5. What could this decimal be?

4.5 4.6 4.7 4.8 4.9 5.1 5.2 5.3 5.4

There are 9 different filling methods

Keywords: I train myself to be healthy teaching courseware, Qingdao edition fourth grade mathematics second volume PPT courseware download, fourth grade mathematics slide courseware download, I train my health PPT courseware download, .PPT format;

For more information about the "I Exercise, My Health" PPT courseware, please click on the "I Exercise, My Health" PPT tab.

"I exercise, I am healthy" PPT courseware 7:

"I Exercise, My Health" PPT Courseware 7 How to find a more complex average problem? Zhang Qiang: (98+95+96+92+95+96+99) 7 Li Ying: (95+96+98+97+96+98+99) 7 Cui Tian: (92+94+96+95+97 +93+98) 7 Put (1.. after the correct expression)

"I exercise, I am healthy" PPT courseware 6:

"I Exercise My Health" PPT Courseware 6 For several unequal quantities, under the premise that the total number remains unchanged, by moving more to make up for the less, an equal number will be obtained. We call this equal number the average of these numbers. number. What are the characteristics of averages? 1. It is not a...

"I exercise, I am healthy" PPT courseware 4:

"I Exercise, My Health" PPT Courseware 4 Learning Objectives 1. Through independent thinking, students will experience the process of generating averages and initially understand the concept of averages. 2. Know the characteristics and functions of averages. 3. Preliminarily learn how to find simple averages. Environmental friendly..

File Info

Update Time: 2024-09-09

This template belongs to Mathematics courseware Qingdao Edition Fourth Grade Mathematics Volume 2 industry PPT template

Preview