76*(1/23-1/53)+23*(1/53+/76)-53*(1/23-1/76)等于多少?1 1 1 1 1 1 76×(───-───)+23×(───+───)-53×(───-───) 23 53 53 76 23 76 “───”是分数线.
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76*(1/23-1/53)+23*(1/53+/76)-53*(1/23-1/76)等于多少?1 1 1 1 1 1 76×(───-───)+23×(───+───)-53×(───-───) 23 53 53 76 23 76 “───”是分数线.
76*(1/23-1/53)+23*(1/53+/76)-53*(1/23-1/76)等于多少?
1 1 1 1 1 1 76×(───-───)+23×(───+───)-53×(───-───) 23 53 53 76 23 76 “───”是分数线.
76*(1/23-1/53)+23*(1/53+/76)-53*(1/23-1/76)等于多少?1 1 1 1 1 1 76×(───-───)+23×(───+───)-53×(───-───) 23 53 53 76 23 76 “───”是分数线.
76*(1/23-1/53)+23*(1/53+/76)-53*(1/23-1/76) =76/23 -76/53 +23/53 +23/76 -53/23 +53/76 =(76-53)/23 -(76-23)/53 +(53+23)/76 =1-1+1 =1