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Authoritative PPT Summary
"Mathematics in Paper-cutting" PPT Courseware 6
1. Situation introduction
Wang Fang’s works account for 1/15 of the group’s total works
Li Jun’s works account for 2/15 of the group’s total works
Liu Hu’s works account for 8/15 of the group’s total works
Yang Hua’s works account for 4/15 of the group’s total works
What percentage of the total works of the first group are accounted for by Wang Fang, Li Jun and Liu Hu?
Flower and bird works account for 1/9 of the group’s total works
Character works account for 5/9 of the group’s total works
Among the works in the second group, what percentage of the total number of works from other categories account for?
2. Cooperation and exploration
What percentage of the total works of the first group are accounted for by Wang Fang, Li Jun and Liu Hu?
Let’s first calculate what percentage of the total works of Wang Fang and Li Jun account for the total number of works in the first group?
In addition, what percentage of the works of Wang Fang, Li Jun and Liu Hu account for the total number of works of the first group?
Think about it: How do you add fractions with the same denominator?
To add fractions with the same denominator, add the numerators without changing the denominator.
Among the works in the second group, what percentage of the total number of works from other categories account for?
Let’s first calculate what percentage of the total number of works by flowers, birds, and figures account for the group’s total works?
What percentage of other types of works account for the total number of the group's works?
3. Independent practice
1. A vegetable plot, with 1/12 kinds of leeks, 5/12 kinds of celery, and the rest planted with tomatoes. What percentage of the land is planted with tomatoes?
2. Is the following calculation correct? Mark "√" if it is correct, mark "×" if it is wrong and correct it.
3. In the Chunguang Primary School library, science and technology books account for 17/100, literature books account for 39/100, tools and tools account for 3/100, and other categories account for 41/100.
(1) What percentage of the total number of books on science and technology, literature, and tools account for?
(2) What percentage of the total number of literature books accounts for more than the sum of science and technology and tools books?
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"Mathematics in Paper-cutting" PPT courseware 5:
"Mathematics in Paper-cutting" PPT courseware 5 1. Situation introduction From the picture, what mathematical information do you know? What questions can you ask based on this information? What fraction of this paper was used to cut the carp and butterfly? Cutting butterflies uses more paper than cutting carps...
"Mathematics in Paper-cutting" PPT courseware 4:
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"Mathematics in Paper-cutting" PPT courseware 3:
"Mathematics in Paper-cutting" PPT courseware 3 1. Situation introduction The paper-cut work is 3 decimeters long and 2 decimeters wide. It is arranged into a square display board. How many decimeters can the side length of the square display board be? How many decimeters can be the shortest? What mathematical information do you know from the picture? According to this...