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[1.8%(1÷75%+1/3)]×1又5/8脱式计算.(能简算的要简算)

[1.8-(1÷75%+1/3)]×1又5/8 =【1.8-4/3+1/3)]×13/8 =【9/5-(4/3-1/3)]×13/8 =[9/5-1]×13/8 =4/5×13/8 =13/10

(1)23-(56-75%)÷37.5%,=23-(56-34)÷38,=23-112×83,=23-29,=49;(2)25.3-1.2÷20%-0.72,=25.3-6-0.72,=19.3-0.72,=18.58;(3)38÷[(75%+15)÷50%],=38÷[95%÷50%],=38÷1.9,=20;(4)4.5÷(1+25%)×75%,=4.5÷54×75%,=3.6×34...

(1)56×( 3 7 - 3 8 ),=56× 3 7 -56× 3 8 ,=24-21,=3;(2)9.75-3.42-5.58,=9.75-(3.42+5.58),=9.75-9,=0.75;(3)2.1×0.5÷4.2,=2.1÷4.2×0.5,=0.5×0.5,=0.25; (4) 3 8 × 6 7 + 6 7 ÷8,=( 3 8 + 1 8 )× 6 7 ,= 1 2 × 6 7...

(1)7.5×2.3+1.9×2.5=17.25+4.75=22;(2)(78.6-0.786×25十75%×21.4)×2011÷75,=(78.6-78.6×0.25+75%×21.4)×2011÷75,=[(1-0.25)×78.6+0.75×21.4]×2011÷75,=[0.75×78.6+0.75×21.4]×2011÷75,=(78.6+21.4)×0.75×2011÷75,=100×0.75×2...

(1)57.5-3.25-16.75,=57.5-(3.25+16.75),=57.5-20,=37.5;(2)125×3.2×25,=125×8×0.4×25,=(125×8)×(0.4×25),=1000×10,=10000;(3)57×16.31-2.31÷75,=57×16.31-2.31×57,=57×(16.31-2.31),=57×14,=10;(4)6760÷13+17×25...

=43.3*8.25*2 =357.225*2 =714.45

(2/3+75%)÷(2-1/2) =(2/3+3/4)÷3/2 =(8/12+9/12)×2/3 =17/12×2/3 =17/18 596-720÷(15×12) =596-720÷12÷15 =596-60÷15 =596-4 =592

(1)(66-32×1.2)÷0.25,=(66-38.4)÷0.25,=27.6÷0.25,=110.4,(2)10×34+17×75%-7×0.75,=10×0.75+17×0.75-7×0.75,=(10+17-7)×0.75,=20×0.75,=15,(3)0.25×[515×(3-2.5×78)],=0.25×[515×(3-3516)],=0.25×[515×1316],=14×26...

原式=12.75÷(14.6-9.5) =12.75÷5.1 =2.5

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