(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31*0.97)简算(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31+0.97)简算,上面写错啦
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![(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31*0.97)简算(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31+0.97)简算,上面写错啦](/uploads/image/z/440071-7-1.jpg?t=%281.5%2B0.31%2B0.97%29%2A%280.31%2B0.97%2B0.82%29-%281.5%2B0.31%2B0.97%2B0.82%29%2A%280.31%2A0.97%29%E7%AE%80%E7%AE%97%281.5%2B0.31%2B0.97%29%2A%280.31%2B0.97%2B0.82%29-%281.5%2B0.31%2B0.97%2B0.82%29%2A%280.31%2B0.97%29%E7%AE%80%E7%AE%97%EF%BC%8C%E4%B8%8A%E9%9D%A2%E5%86%99%E9%94%99%E5%95%A6)
(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31*0.97)简算(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31+0.97)简算,上面写错啦
(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31*0.97)简算
(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31+0.97)简算,上面写错啦
(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31*0.97)简算(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31+0.97)简算,上面写错啦
(1.5+0.31+0.97)×(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)×(0.31+0.97)
=(1.5+0.31+0.97)×(0.31+0.97+0.82)-(1.5+0.31+0.97)×(0.31+0.97)-0.82×(0.31+0.97)
=(1.5+0.31+0.97)×(0.31+0.97+0.82-0.31-0.97)-0.82×(0.31+0.97)
=(1.5+0.31+0.97)×0.82-0.82×(0.31+0.97)
=(1.5+0.31+0.97--0.31-0.97)×0.82
=1.5×0.82
=1.23
这个算式你是不是写错了?最后的括号里是0.31+0.97吧
可以将1.5+0.31当做一个整体 假设为A
那个这个算式就可以看成是:
(1.5+A)*(0.82+A)- (A+0.97+0.82)*A
最后约分可得到1.5*0.82=1.23可以写完整吗?啊 不好意思啊,写错了,重新写一遍: 可以将0.97+0.31当做一个整体 假设为A 那个这个算式就可以看成...
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这个算式你是不是写错了?最后的括号里是0.31+0.97吧
可以将1.5+0.31当做一个整体 假设为A
那个这个算式就可以看成是:
(1.5+A)*(0.82+A)- (A+0.97+0.82)*A
最后约分可得到1.5*0.82=1.23
收起
(1.5+0.31+0.97)*(0.31+0.97+0.82)-(1.5+0.31+0.97+0.82)*(0.31*0.97)
=(1.5+0.31+0.97)*(0.31+0.97)+(1.5+0.31+0.97)*0.82-(1.5+0.31)*0.82-(1.5+0.31+0.97)*(0.31*0.97)
=(1.5+0.31+0.97)*0.82-0.82*(0.31*0.97)
=1.5*0.82
=1.23