1、280+840÷24×5 84.7×7-54.7×7 28-(3.4+1.25×2.4) 36.72÷4.25×9.9 3.26×0.52+3.26×0.48+7.05 2.55×7.1+2.45×7.1 5180-705×6 87.4×27.6+73.4×87.4-87.4 777×9+1111×3 24÷2.4-2.5×0.8 [10-(
2、0.2+6.37÷0.7)]÷0.01 0.8×〔15.5-(3.21+5.79)〕 (4121+2389)÷7 5.7×101 4.2×(12.5-7.5÷0.75) (31.8+3.2×4)÷5 30.8÷[14-(9.85+1.07)] 671×15-974 31.5×4÷(6+3) 405×(3213-3189)
3、 2.881÷0.43-0.24×3.5 2÷2.5+2.5÷2 3.416÷(0.016×35) 20×[(2.44-1.8)÷0.4+0.15] 194-64.8÷1.8×0.9 0.8×[(10-6.76)÷1.2] 19.4×6.1×2.3 5.67×0.2-0.62 18.1×0.92+3.93 0.0430.24+0.875
4、 0.4×0.7×0.25 0.75×102 100-56.23 0.78+5.436+1 469×12+1492 [60-(9.5+28.9)]÷0.18 0.64×25×7.8+2.2 85×(95-1440÷24) 125×(33-1) 37.4-(8.6+7.24-6.6) 37.85-(7.85+6.4)
5、 (93+25×21)×9 384÷12+23×371 (39-21)×(396÷6) 156×[(17.7-7.2)÷3] [37.85-(7.85+6.4)] ×30 28×(5+969.9÷318) 81÷[(72-54)×9] 57×12-560÷35 848-640÷16×12
6、 2800÷ 100+789 960÷(1500-32×45) [192-(54+38)]×67 138×25×4 (12+24+80)×50 704×25 25×32×125 32×(25+125) 178×101-178
7、 84×36+64×84 75×99+2×75 83×102-83×2 98×199 25×(24+16) 123×18-123×3+85×123 79×42+79+79×57 7300÷25÷4 15.39×4.62+5.38×15.39 4.3+3.91÷(2
8、2-19.7) 4.3+3.91÷(22-19.7) 2.9×1.4+2×0.16 200-(3.05+7.1)×18 30.8÷[14-(9.85+1.07)] (2.44-1.8)÷0.4×20 2.9×1.4+2×0.16 5.4×2.08+66×0.208-2.08 30.8÷[14-(9.85+1.07)]
9、 (12.5+1.25+0.125)×80 32×125×2.5 94÷(6.84×8.5-31.46÷0.55) 9.2+9. 728÷3.2×1. 5 10.5÷(5. 1-4 . 4)+18.25 (2.55×1.5+1.5+6.45×1.5)÷0.3 [(8.3-6.8)×0.9+3.65]÷2.5
10、 12.25-3.1+0.85-6.17 (1.9-1.9×0.9)÷(3.8-2.8) 2.65×1.7+1.35×1.7 630÷[2.98+6.5×(3.2-3.12)] 9.1 - 33.6÷5.6×1.5 (0.62 + 7.638÷20.1)÷0.25 1.8 - (7.5 - 2.25)÷3.75 2.706÷[5.3
11、 -(0.8 + 0.75)×2] 5.6×[(10-2.4)÷7.6]÷1.6 8.37×0.4+9.6×8.37 5.28+12.5×4.12×0. 8+4.72 (10.8-1.06-0.74)×2.87+2.87 3.25×(30.1-24.91÷4.7) [68.8-(7.8+16.08×2.5)]÷1.3 7.05×23. 7+
12、7.05×76.3 0.125×3.2×2.5 50+160÷40× (58+370)÷(64-45) 120-144÷18+35 347+45×2-4160÷52 (58+37 )÷(64-9×5 ) 95÷(64-45) 178-145÷5×6+42 420+580-64×21÷28
13、 85+14×(14+208÷26 ) (284+16)×(512-8208÷18) 120-36×4÷18+35 (58+37 )÷(64-9×5 ) (6.8-6.8×0.55)÷8.5 0.12× 4.8÷0.12×4.8 (3.2×1.5+2.5 )÷1.6 6-1.6÷4 5.38+7
14、85-5.37 7.2÷0.8-1.2×5 6-1.19×3-0.43 6.5× (4.8-1.2×4 ) 0.68×1.9+0.32×1.9 10.15-10.75×0.4-5.7 5.8× (3.87-0.13 )+4.2×3.74 32.52- (6+9.728÷3.2)×2.5
15、100×24÷ (24-4 ) 7.2 ×(9-5 )×0.3 120-144÷18+35 347+45×2-4160÷52 (58+37 )÷(64-9×5 ) 95÷ (64-45) (136+64)×(65-345÷23) 85+14×(14+208÷26 ) 120-36×4÷18+35
16、58+37 )÷(64-9×5 ) (6.8-6.8×0.55)÷8.5 0.12× 4.8÷0.12×4.8 3.2× (1.5+2.5)÷1.6 4.02+5.4+0.98 5.17-1.8-3.2 13.75-(3.75+6.48) 3.68+7.56-2.68 7.85+2.
17、34-0.85+4.66 35.6-1.8-15.6-7.2 3.82+2.9+0.18+9.1 9.6+4.8-3.6 7.14-0.53-2.47 5.27+2.86-0.66+1.63 13.35-4.68+2.65 47.8-7.45+8.8 0.398+0.36+3.6
18、4 15.75+3.59-0.59+14.25 42.5-(6.07+1.13) 73.8-1.64-13.8-5.36 66.86-8.66-1.34 0.25×16.2×4 3.72×3.5+6.28×3.5 36.8-3.9-6.1 2
19、 5.48-(9.4-0.52) 4.8×7.8+78×0.52 3.6×102 6.4×0.25+3.6÷4 32+4.9-0.9 4.8-4.8×0.5 (1.25-0.125)×8 4.8×100.1 56.5×9.9+56.5
20、 7.09×10.8-0.8×7.09 4.2÷3.5 320÷1.25÷8 18.76×9.9+18.76 3.52÷2.5÷0.4 4.78÷0.2+3.44 3.6-0.6×2 3.65×10.1 3.
21、6-3.6×0.8 15.2÷0.25÷4 5.6÷3.5 9.6÷0.8÷0.4 4.2×99+4.2 0.89×100.1 146.5-(23+46.5) 17.8÷(1.78×4) 5.83×2+4.27
22、 (45.9-32.7)÷8÷0.125 9.7×99+9.7 4.36×12.5×8 15.6×13.1-15.6-15.6×2.1 0.65×101 27.5×3.7-7.5×3.7 8.54÷2.5÷0.4 3.83×4.56+3.83×5.44 1.25×2.5×32 0.49÷1.4 3.9-4.1+6.1-5.9 24






