(1)3500-(124+76)×16 (2)(480+20×4)÷20 (3)180+60÷5×6 (4)1721-36×(432-408) (5)420-(25+15)×4 (6)8×(28+18+15) (7)(230-215÷5)×16 (8)(160+880÷20)×4(9)(328+198÷9)÷70 (10)65+260÷4×98 \n(11)(73+22)÷(72-67) (12)36×5÷(27-17) (13)3200÷(1280-72×15) (14)(457+28×14)×5 (15)280÷(240-8×25) (16)30+(96-12×5) (17)50-[(165+35)÷100 ] (18)32÷(20-96÷24) \n(19)630÷(21-12)×16 (20)(420-42×7)÷9 (21)3500-(124+76)×16 (22)(480+20×4)÷20 (23)180+60÷5×6 (24)1721-36×(432-408) (25)420-(25+15)×4 (26)8×(28+18+15) \n(27)(230-215÷5)×16 (28)(160+880÷20)×4 (29)(90-21×2)÷12 (30)70+(750-65×11) (31)(800÷20+36)×12 (32)360÷9÷8+16 (33)1080-3500÷50+346 (34)(300÷15-11)×12 (35)350-5×3÷5 (36)480-(80+20)÷4 \n(37)(60-12×4)×15 (38)720+320÷16×7 (39)(328+198÷9)÷70 (40)65+260÷4×98 答案(1)300 (2)28 (3)252 (4)857 (5)260 (6)480 (7)2992 (8)2856(9)5 (10)6435 (11)19 (12)18 (13)16 (14)4245 (15)7 (16)66 (17)48 (18)2 \n(19)1120 (20)14 (21)300 (22)28 (23)252 (24)857 (25)260 (26)480 (27)2992 (28)2856 (29)4 (30)105(31)912 (32)21 (33)1356 (34)108 (35)347 (36)455 (37)180 (38)860 (39)5 (40)6435