Question

有理数的加减混合运算|141/111-141/99|+|141/111-42/99|=?|-6又3/8+2又1/2|+（

Answer 1

|141/111-141/99|+|141/111-42/99|=141/99-141/111+141/111-42/99=1

|-6又3/8+2又1/2|+（-8又7/8）+|-3-1/2|=31/8-71/8+7/2

=-5+7/2

=-3/2