Question

苏教版五年级下册600道分数简便计算

Answer 1

13 (1-1/4+8/9)/7/9

14 2/3+1/6+3/24+2/21

52-(32+45)

78+18+19

97-(27-1021)

58+56+19

240400+12400-150400

186240+88240+252240

143-(38542-252240...