1, workload = working efficiency × working time.

2, working hours = workload ÷ work efficiency.

3, work efficiency = workload ÷ working hours.

4. Workload refers to the workload, which can be the total workload, generally expressed by the number 1.

Thoughts on solving application problems;

(1) There are some application problems of method of substitution. Give the relationship between two or more unknowns and ask for these unknowns. When thinking, we can replace another unknown with one unknown according to the conditions given in the question, thus simplifying the relationship between data volumes. So as to find a solution to the problem.

(2) Hypothetical method Some application problems need two or more unknowns. When thinking, you need to put forward some assumptions first, and then calculate according to the known quantity in the stem. According to the contradiction of data volume, make appropriate adjustments and finally find the correct answer.