(1/30+1/35+1/63)乘2又1/7等于多少.过程加想法.
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![(1/30+1/35+1/63)乘2又1/7等于多少.过程加想法.](/uploads/image/z/1009837-37-7.jpg?t=%281%2F30%2B1%2F35%2B1%2F63%29%E4%B9%982%E5%8F%881%2F7%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91.%E8%BF%87%E7%A8%8B%E5%8A%A0%E6%83%B3%E6%B3%95.)
(1/30+1/35+1/63)乘2又1/7等于多少.过程加想法.
(1/30+1/35+1/63)乘2又1/7等于多少.过程加想法.
(1/30+1/35+1/63)乘2又1/7等于多少.过程加想法.
(1/30+1/35+1/63)乘2又1/7
=(21/630+18/630+10/630)x15/7
=49/630x15/7
=7/90x15/7
=1/6