(3) 32×125×25 (4)(2.5+25)×0.4
(5)3700-2185-815 (6) ×125
(7) 125×(8+4) (8) 75×99+75
(9)60×(15+500) (10) 435+1999
(11) 170×4+80×4 (12)103×56
(13)99×14 (14)102×36
(15)49×80+80 (16)67×9+33×9
(17)(13×8)×125 (18)25×(40×32)
(19)(5×7)×80 (20) 8×14×125×6
(21)2843-598 (22)4×8×25×125
(23)36×25 (24)259+468+741+532
(25)12×15+12×35 (26) 31×128-28×31
(27)(25+250)×4 (28)(125×125)×8
(28)(- )×60 (30) ×+×
(31)25×8 (32) ×(15×)×
(33)×101- (34)×÷×
(34)× 99 + (36)×+ ×-
(37)×25 (38)36× (39) ( - )×
(40) ×6.6+2.5× (41)--
(42)4.6+++5.4 (43)×(-÷)
(44)2.8++7.2+ (45)+2.25++
(46) ++ (47)-+
(48)-++ (49)0.75+++0.375
(50) ++++