""Project Hope" Charity Performance" PPT courseware of linear equations in one variable

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Beijing Normal University seventh grade first volume mathematics	pptx	6 MB

""Project Hope" Charity Performance" PPT courseware of linear equations in one variable

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Upload Time: 2024-10-19

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""Project Hope" Charity Performance" PPT courseware of linear equations in one variable

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①The problem we encountered today is more complicated than the previous problem. It contains two unknown quantities and two equivalent relationships. One of the unknown quantities can be set as an unknown quantity, and the other unknown quantity can be expressed as containing using one of the equivalent relationships. The algebraic expression of the unknown, while another equivalence relation is used to formulate equations.

②We can use the table method to clarify the relationship between various quantities in more complex problems.

1. There are five lamps in an office, including 40 watts and 60 watts. The total wattage is 260 watts. How many 40-watt and 60-watt bulbs are there?

Equivalent relationship: number of 40-watt light bulbs + number of 60-watt light bulbs = 5 ①

Wattage of 40-watt light bulb + wattage of 60-watt light bulb = 260 watts②

According to the equivalence relationship②, the equation can be listed:__________

summary

1. Through understanding of "Project Hope", we should cherish our study time more and try our best to help out-of-school children in poor areas.

2. When encountering more complex practical problems, we can use tables to analyze the equivalence relationships in the problem, list the equations, and test the solutions to the equations.

3. For the same problem, the methods of setting the unknowns are different, and the complexity of the equations listed are generally also different, so you have to make choices when setting the unknowns.

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For more information about the PPT courseware of "Linear Equation of One Variable PPT Hope Project Benefit Performance", please click the "Linear Equation of One Variable PPT Project Hope Charity Performance PPT" tag.

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Update Time: 2024-10-19

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""Project Hope" Charity Performance" PPT courseware of linear equations in one variable