(1)1125﹣997 (2)12﹣(1+2) (3)(﹣)×12
(4)4.35+4.25+3.65+3.75 (5)17﹣3﹣4 (6)22.3﹣2.45﹣5.3﹣4.55
(7)187.7×11﹣187.7 (8)998+1246 (9)400÷125÷8
(10)1×2× (11)34×(2+) (12)3.4×99+3.4
(13)÷2+× (14)(++)×72 (15)43×+57.125×﹣0.5
(16)4+3.2+5+6.8 (17)25×(37×8) (18)125×8.8
(19)17.15﹣8.47﹣1.53 (20)0.125×0.25×32 (21)4.25﹣3﹣(2﹣1)
(22)2.42÷+4.58×﹣4÷3.