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3.5+0.5x=7.5÷0.3二

3.5+0.5x=7.5÷0.3 0.5x=25-3.5 x=21.5/0.5 x=43

请采纳

3(3x-2)=10-0.5(x+3.5) 3*3x-3*2=10-0.5x-0.5*3.5 9x-6=10-0.5x-1.75 9x+0.5x=10-1.75+6 9.5x=14.25 x=14.25÷9.5 x=1.5

原式=3.5×4.8÷0.3 =3.5×(4.8÷0.3) =3.5×1.6 =7×0.5×1.6 =7×(0.5×1.6) =7×0.8 =5.6

1.8÷15+0.5x0.3用简便方法计算 1.8÷15+0.5x0.3 =0.12+0.15 =0.27 直接计算

(1)1.425÷(3.8×0.5)=1.425÷1.9=0.75;(2)2.25÷7.5×(3.2÷2.5)=2.25÷7.5×1.28=0.3×1.28=0.384;(3)15.6÷24÷0.2=0.65÷0.2=3.25;(4)30.8÷[8×(5.09-4.59)]=30.8÷[8×0.5]=30.8÷4=7.7;(5)[5.7+(18-3.5)]÷0.05=[5.7+14.5]÷0.05=20....

1.8+18/1.5-0.5*0.3=18/10+18/1.5-0.5*0.3=18/(10+1.5)-0.5*0.3

0.25÷(x+0.3)=0.5 x+0.3=0.25÷0.5 x+0.3=0.5 x=0.2

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