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49又48/49×12答:49又48/49X12=600.25。简便计算:列式计算:49又48/49X12=(49Ⅹ48十49)/48X12=(49X48十49)X12/48=(49X48十49)/4=〈49X(49...
49又48/49×12答:49又48/49X12=600.25。简便计算:列式计算:49又48/49X12=(49Ⅹ48十49)/48X12=(49X48十49)X12/48=(49X48十49)/4=〈49X(49...