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Authoritative PPT Summary
"Understanding of Decimals" PPT
Part One: Introduction of New Course
When people measure and calculate, the results they get are often not integers and are often expressed in decimals.
The length of a skipping rope is 2 meters and 15 centimeters, which can be written as 2.15 meters.
It costs 3 yuan and 80 cents to buy a bottle of drink and a piece of bread, which can be written as 3.8 yuan.
The numbers I have learned before, such as 0, 1, 2, 3, 4... are all integers. The numbers we need to learn now, such as 2.15, 3.8, 0.8, etc., are all decimals.
Divide 1 meter into 10 equal parts, each part is 1 decimeter.
1 decimeter is 1/10 of a meter, which can also be written as 0.1 meter;
5 decimeters is 5/10 meters, which can also be written as 0.5 meters;
7 decimeters is 7/10 meters, and can also be written as ( ) meters.
PPT on understanding decimals, part 2: content analysis
Divide 1 meter into 100 equal parts, each part is 1 centimeter, which can be written as 1/100 meter or 0.01 meter.
9 centimeters is 9/100 meters, which can also be written as 0.09 meters.
25 centimeters is 25/100 meters, which can also be written as 0.25 meters.
Fractions with a denominator of 100 can be written to two decimal places.
Keywords: Free download of Hebei Education Edition mathematics PPT courseware for the second volume of fourth grade, PPT download of understanding of decimals, .PPT format;
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"Understanding of Decimals" PPT courseware for preliminary understanding of decimals:
"Understanding of Decimals" Preliminary Understanding of Decimals PPT Courseware Learning Objectives 1. Combined with specific situations, understand the meaning of decimals and understand the characteristics of decimals. 2. Able to recognize, read and write simple decimals. ... ... ... Like 0, 1, 2, 3, 4, they are all integers. Like 0.1, 0...