简便运算:98×53/97=?8/7×【1/5÷(7/10-3/10)】=?

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简便运算:98×53/97=?8/7×【1/5÷(7/10-3/10)】=?

简便运算:98×53/97=?8/7×【1/5÷(7/10-3/10)】=?
简便运算:98×53/97=?8/7×【1/5÷(7/10-3/10)】=?

简便运算:98×53/97=?8/7×【1/5÷(7/10-3/10)】=?
数学之美团为你解答
98× 53/97
= (97+1)×53/97
= 53 + 53/97
= 53又53/97
8/7 × [ 1/5 ÷ (7/10 - 3/10) ]
= 8/7 × [ 1/5 ÷ 4/10]
= 8/7 × 1/5 × 10/4
= 4/7