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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)

①2009×97.75+4018×1.125,=2009×97.75+2009×2×1.125,=2009×(97.75+2.25),=2009×100,=200900;②4.02×8.1× 3 5 ÷(0.6×0.81),=4.02×8.1×0.6÷0.6÷0.81,=4.02×(8.1÷0.81)×(0.6÷0.6),=4.02×10×1,=40.2;③9999×8888÷6666,=9999×8×1111...

5分之1×8÷5分之4 =5分之1×8×4分之5 =2 4.8÷5+5.2×8分之1 =0.96 + 0.65 =1.61 (2分之1-3分之1×75%)÷0.25 =(2分之1-4分之1)÷0.25 = 4分之1÷0.25 =1

(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)(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...

(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)8/9×[7/8-(7/16-1/8)](2)10×3/4+17×75%-7×0. =8/9×[7/8-7/16+1/8] =8/9×[7/8+1/8-7/16] =8/9×[1-7/16] =8/9×9/16 =1/2 (2)10×3/4+17×75%-7×0.75 [3/4=75%=0.75] =0.75×(10+17-7) =0.75×20 =15

(1)2.6×1.9÷2.6×1.9=(2.6÷2.6)×(1.9×1.9)=1×3.61=3.61(2)4.264÷(0.16×20.5)=4.264÷3.28=1.3(3)12×2.5+0.8×2.5=3×(4×2.5)+0.8×2.5=3×10+0.8×2.5=30+2=32(4)3.75÷0.25÷0.4=3.75÷(0.25×0.4)=3.75÷0.1=37.5(5)30-[5.5+18÷(5.2+...

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