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0.8乘2/11加4.8乘括号负2/7减2.2除以3/7加0.8乘11分之9等于多少

0.8*2/11+4.8*(-2/7)-2.2÷3/7+0.8*9/11=0.8*(2/11+9/11)-48/35-77/15=0.8-(48/35+77/15)=4/5-683/105=-599/105

0.8*2/11+4.8*(-2/7)-2.2÷7/2+0.8*9/11=0.8*(2/11+9/11)-(4.8+2.2)*2/7=0.8*1-7*2/7=0.8-2=-1.2

简单:如下:0.8x2/11+4.8x[-7/3]-2.2÷7/3+0.8x9/11 =0.8x2/11+0.8x9/11+4.8x[-7/3]-2.2÷7/3 =0.8x(2/11+9/11)-4.8x7/3-2.2x3/7 =0.8-1.6x7-33/35 =-10.4-33/35 =-52/5-33/35 =-364/35-33/35 =-397/35

=0.8*(2/11+9/11)+4.8*(-3/7)-2.2*3/7 =0.8-3/7*(4.8+2.2) =0.8-3 =-2.2 这很简单啊,求采纳啊亲不懂求追问

约等于-77.5 麻烦好评

=1.6/11-28.8/21-2.2/21+7.2/11=8.8/11-31/21=0.8-31/21=16.8/21-31/21=-14.2/21=-71/105=-0.676(190476)190476.

你好!0.8*(2/11+9/11)-(48/35+15/77)=0.8-683/105=599/105 我的回答你还满意吗~~

第三项是否为2.2*3/7??一、四项合并,二、三项合并 原式=0.8*(2/11+9/11)- (9.6+6.6)/7 =0.8-16.2/7

0.8*13/11-7.8*3/7+2.2÷7/3+0.8*9/11-(0.2)^2=0.8*13/11+0.8*9/11-7.8*3/7+2.2*3/7-(0.2)^2=0.8*(13/11+9/11)-(7.8-2.2)*3/7-(0.2)^2=0.8*2-5.6*3/7-0.04=1.6-2.4-0.04=-0.84

括号-8/3括号乘负(7/11)+7/11除以括号3/2(-8/3)*(-7/11)+7/11*2/3=7/11*(8/3+2/3)=7/11*10/3=70/33

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