3.5x+1.4+2.1解方程

蓬琛卫5783.5*2.1+7.9简便 -
蒋博宙18673475982 ______ 3.5x2.1+7.9 =3.5x(2+0.1)+(8-0.1) =3.5x2+3.5x0.1+8-0.1 =7+.035+8-0.1 =7+8+0.35-0.1 =15+0.25 =15.25

蓬琛卫5783.5x等于1.4 -
蒋博宙18673475982 ______ 3.5x=1.4 x=1.4÷3.5 x=0.4

蓬琛卫5783.5*1.4+36.5*1.1+36.5*0.3怎么简便 -
蒋博宙18673475982 ______[答案] 3.5*1.4+36.5*1.1+36.5*0.3 =3.5x1.4+ 36.5x(1.1+0.3) =3.5x1.4 +36.5x1.4 =1.4x(3.5+36.5) =1.4x40 =56

蓬琛卫5783x十0.5x=7,怎么解方程? -
蒋博宙18673475982 ______ 3.5X=7 X=7÷3.5 X=2

蓬琛卫5783.5x+x - 1.4=18.4解方程 -
蒋博宙18673475982 ______ 3.5x+x-1.4=18.44.5x=18.4+1.44.5x=19.8 x=19.8/4.5 x=4.4

蓬琛卫5783.5(x+7)=25.9解方程 -
蒋博宙18673475982 ______ 3.5(x+7)=25.9 3.5x+3.5*7=25.9 3.5x+24.5=25.9 3.5x=25.9-24.5 3.5x=1.4 x=1.4÷3.5 x=0.4 求采纳

蓬琛卫578怎样简便就怎样算3.5*1.4+8.6 -
蒋博宙18673475982 ______[答案] =(1+2.5)x1.4+8.6 =2.5x1.4+1.4+8.6 =10+5x0.7 =10+3.5 =13.5

蓬琛卫57832.5*1.4+0.6*1.2简便方法计算 -
蒋博宙18673475982 ______ 32.5*1.4+0.6*1.2=32.5*2*0.7+0.72=65*0.7+0.72=45.5+0.72=46.22

蓬琛卫578方程2.5x+x=1.4怎么解 -
蒋博宙18673475982 ______ 2.5x+x=1.4 解:3.5x=1.4 x=1.4÷3.5 x=0.4

蓬琛卫5780.7乘以二加上3.5x等于2.1解方程 -
蒋博宙18673475982 ______ 0.7*2+3.5x=2.11.4+3.5x=2.1 3.5x=2.1-1.4 3.5x=0.7 x=0.2