Commonly used quantitative relations
1, 1 multiple x multiple = multiple, multiple1multiple = multiple, multiple = 1 multiple.
2. Speed × time = distance, distance/speed = time, distance/time = speed.
3. Appendix+Appendix = sum, and-one addend = another addend.
4. The minuend-subtrahend = difference, the minuend-difference = subtrahend, and the difference+subtrahend = minuend.
5, factor × factor = product, product ÷ one factor = another factor.
6. Divider = quotient, dividend = divisor, quotient × divisor = dividend.
What is equivalence relation?
Equivalence relation refers to the equal relation between quantities, which is a kind of quantitative relation. Mathematical problems often contain many equivalence relations. If we need to solve the problem by equation, we need to find out the equivalence relation in the problem.
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