(2/15+1/12)×3+3/5 4/9×【3/4-(7/16-1/4)】 简便运算
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![(2/15+1/12)×3+3/5 4/9×【3/4-(7/16-1/4)】 简便运算](/uploads/image/z/755803-19-3.jpg?t=%EF%BC%882%2F15%2B1%2F12%29%C3%973%2B3%2F5+4%2F9%C3%97%E3%80%903%2F4-%EF%BC%887%2F16-1%2F4%EF%BC%89%E3%80%91+%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
(2/15+1/12)×3+3/5 4/9×【3/4-(7/16-1/4)】 简便运算
(2/15+1/12)×3+3/5 4/9×【3/4-(7/16-1/4)】 简便运算
(2/15+1/12)×3+3/5 4/9×【3/4-(7/16-1/4)】 简便运算
(2/15+1/12)×3+3/5
= 2/5 +1/4 + 3/5
=2/5+ 3/5 +1/4
= 1+ 1/4
= 5/4
4/9×【3/4-(7/16-1/4)】 简便运算
= 4/9 x 【3/4+1/4-7/16】
= 4/9 x (1-7/16)
= 4/9 x (9/16)
= 1/ 4