简算75×1/76×77

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简算75×1/76×77简算75×1/76×77简算75×1/76×7775×1/76×77=75/76×(76+1)=75/76×76+75/76×1=75+75/76=75又75/7675×1/7

简算75×1/76×77
简算75×1/76×77

简算75×1/76×77
75×1/76×77
=75/76×(76+1)
=75/76×76+75/76×1
=75+75/76
=75又75/76

75×1/76×77
=75/76×76+75/76×1
=75+75/76
=75又75/76

75×1/76×77
=75x77/76
=(76-1)x77/76
=76x77/76-77/76
=77-77/76
=75又75/76

75×1/76×77
=(76-1)×(76+1)×1/76
=(76的平方-1的平方)×1/76
=76-1/76
=75+75/76