(5/12+1/19)×12+7/19 简便计算怎么算?是简便计算

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(5/12+1/19)×12+7/19 简便计算怎么算?是简便计算
(5/12+1/19)×12+7/19 简便计算怎么算?是简便计算

(5/12+1/19)×12+7/19 简便计算怎么算?是简便计算
(5/12+1/19)×12+7/19
=5/12x12+1/19x12+7/19
=5+(12/19+7/19)
=5+1
=6

(5/12+1/19)×12+7/19
=5/12×12+1/19×12+7/19
=5+12/19+7/19
=5+1
=6

用分配率先把括号打开啊,小妹妹:
(5/12+1/19)×12+7/19
=(5/12)×12+(1/19)×12+7/19
=5+12/19+7/19
=5+1
=6