""Project Hope" Charity Performance" PPT courseware of linear equations in one variable Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
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""Project Hope" Charity Performance" PPT courseware of linear equations in one variable
Notice
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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