如题所述
四分之三乘以二十七变成四分之三乘以十九加四分之三乘以八，然后把四分之一乘以十九与四分之三乘以十九一起算，结果再加上四分之三乘以八就好算了
温馨提示：答案为网友推荐，仅供参考
第1个回答 2013-07-19
(1/4) * 19 + (3/4) * 27
= (1/4) * (19 + 3 * 27)
= (1/4) * (19 + 81)
= (1/4) * 100
= 25本回答被网友采纳
= (1/4) * (19 + 3 * 27)
= (1/4) * (19 + 81)
= (1/4) * 100
= 25本回答被网友采纳
