1、 脱式30题 2800÷ 100+789 (947-599)+7×64 36×(15-276÷23) = = = = = = = =
2、 = (93+25×21)×9 723-(521+504)÷25 (39-21)×(396÷6) = = = = = = = =
3、 = 507÷13×63+498 384÷12+3×31 [37—(7+6)] ×30 = = = = = = = =
4、 = 16×[(17-8)÷3] 28×(5+96÷32) 81÷[(72-54)×9] = = = = = = = =
5、 = 57×12-560÷35 848-640÷16×12 960÷(1500-32×45) = = = = = = = = =
6、 [192-(54+38)]×6 (12+24+80)×50 32×(25+125) = = = = = = = = = 123×18-123×
7、3+85×123 25×(24+16) 178×99+178 = = = = = = = = = (140-70)×54 63+84
8、×2÷42 490÷7+24×5 = = = = = = = = = 45+240÷12 15×7+85×7
9、46-20)×30-90 = = = = = = = = = 25×27×4 (40-4)×25 2400÷80-14×2 =
10、 = = = = = = = = 108-(83+360÷60) (420+48)÷(375-345) 290-(34×3+99) = = = = = = = = = 4






