求解(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)=？奥数
答案:3 悬赏:60
解决时间 2021-02-18 20:37
- 提问者网友：月葬花瑰
- 2021-02-18 07:38
求解(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)=？奥数
最佳答案
- 二级知识专家网友：woshuo
- 2021-02-18 08:34
(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)
=(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23)*(0.12+0.23)-0.34*(0.12+0.23)
=(1+0.12+0.23)*[(0.12+0.23+0.34)-(0.12+0.23)]-0.34*(0.12+0.23)
=(1+0.12+0.23)*0.34-0.34*(0.12+0.23)
=[(1+0.12+0.23)--(0.12+0.23)]*0.34
=1*0.34
=0.34
=(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23)*(0.12+0.23)-0.34*(0.12+0.23)
=(1+0.12+0.23)*[(0.12+0.23+0.34)-(0.12+0.23)]-0.34*(0.12+0.23)
=(1+0.12+0.23)*0.34-0.34*(0.12+0.23)
=[(1+0.12+0.23)--(0.12+0.23)]*0.34
=1*0.34
=0.34
全部回答
- 1楼网友：短发女王川岛琦
- 2021-02-18 08:59
0.34
- 2楼网友：陪我到地狱流浪
- 2021-02-18 08:47
(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)
=(1+0.12+0.23)*(0.12+0.23+0.34)-[1+(0.12+0.23+0.34)]*(0.12+0.23)
=(1+0.12+0.23)*(0.12+0.23+0.34)-1*(0.12+0.23)-(0.12+0.23+0.34) *(0.12+0.23)
=(0.12+0.23+0.34)*[(1+0.12+0.23)-(0.12+0.23)]-1*(0.12+0.23)
=(0.12+0.23+0.34)*1-1*(0.12+0.23)
=0.12+0.23+0.34-0.12-0.23
=0.34
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