改编应用题是应用题中经常遇到的一种练习。在改编时,要掌握一些改编的方法。例如:乐生小学三年级有4个班,每班45人;四年级有200人。三年级和四年级一共有多少人?方法一:变换题中的己知条件。把题中的已知条件改为未知条件。如把上题的已知条件“四年级有200人”改为“四年级有5个班,每班40人”。便可把原题改编为:乐生小学三年级有4个班,每班45人;四年级有5个班,每班40人。三年级和四年级一共有多少人? Adapt the application questions is often encountered in the application of a practice. In adaptation, to master some adaptation methods. For example: Lhasa Primary School third grade has 4 classes, each class 45; fourth grade has 200 people. How many people are in grade three and grade four? Method One: Known Conditions in Transformation Questions. Change the known conditions in the title to unknown conditions. As the known conditions on the title “fourth grade has 200 ” to “fourth grade has 5 classes, 40 classes ”. The original title can be adapted as: Lhasa Primary School third grade has 4 classes, each class 45 people; fourth grade has 5 classes, 40 classes. How many people are in grade three and grade four?