Question

【（382＋498x381）x198】（382x498－116）怎样简便运算

Answer 1

(382x498-116)/(382+498x381)
=(381x498+498-116)/(382+498x381)
=(381x498+498-116)/(382+498x381)
=(381x498+382)/(382+498x381)
=1