Subtraction equivalence relation: minuend = subtraction+difference; Difference = minuend-minuend; Subtraction = minuend-difference

Addition equivalence relation: addend = and-another addend; Sum = Appendix+Appendix

Multiplication equivalence relation: product = factor × factor; Factor = product ÷ another factor

Division equivalence relation: dividend = divisor × quotient; Quotient = divider-divider; Divider = Divider

Multiple equivalence relation: each copy × number of copies = total number of copies; Total number of copies/number of copies = number of copies; Total copies/number of copies = number of copies

Equivalence (quantity) relation of fractional division: unit "1"× corresponding fraction = corresponding component.

Equivalence relation is a formula to express the equal relation between quantities. If it is required to be solved by an equation, it is necessary to find out the equivalence relation in the problem and list the equivalence relation.

Extended data:

For example, a workshop originally planned to produce 10000 machine parts, but now it has been produced for 8 hours, and 4,800 more will be produced to complete the task. How many machine parts are produced per hour on average? There is an equal relationship between the number of questions:

Output per unit time × production time = how much was produced.

Total planned output-already produced = required to be produced.

"Equivalence relation" refers to the equal relation between quantities, which is one of the quantitative relations. 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.

Baidu encyclopedia-equivalence relation