"Mathematics in Paper-cutting" PPT Courseware 5

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"Mathematics in Paper-cutting" PPT Courseware 5

1. Situation introduction

What mathematical information do you know from the picture?

What questions can you ask based on this information?

What fraction of this paper was used to cut the carp and butterfly?

How much more paper is used to cut a butterfly than to cut a carp?

2. Cooperation and exploration

What fraction of this paper was used to cut the carp and butterfly?

According to the basic properties of fractions, the resulting number can be converted into a simpler fraction:

Converting a fraction into a fraction that is equal to it but has a smaller numerator and denominator is called a reduction.

The reduction can be written in the following form.

First divide by the common factor 2 of 12 and 18 respectively.

Then divide by the common factor 3 of 6 and 9 respectively.

The greatest common factor 6 that can be divided by 12 and 18 respectively

3. Independent practice

1. Fill in the blanks.

2. Calculate the following two questions.

3. Simplify first, and then compare the two fractions in each group below.

4. There are 8 gold medals in the diving event of the 2012 London Olympics, and the Chinese diving team, known as the "Dream Team", won 6 gold medals. What fraction of the total number of gold medals won by the Chinese diving team accounts for the total number of gold medals in diving events?

6÷8=3/4

Answer: The number of gold medals won by the Chinese diving team accounts for 3/4 of the total number of gold medals in diving events.

Keywords: Mathematics teaching courseware in paper-cutting, Qingdao edition fifth grade mathematics volume 2 PPT courseware download, fifth grade mathematics slide courseware download, mathematics in paper-cutting PPT courseware download, .PPT format;

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Update Time: 2024-10-02

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

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