2\3+(4\7+1\2)*7\25 简算
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![2\3+(4\7+1\2)*7\25 简算](/uploads/image/z/309474-18-4.jpg?t=2%5C3%2B%EF%BC%884%5C7%2B1%5C2%29%2A7%5C25+%E7%AE%80%E7%AE%97)
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2\3+(4\7+1\2)*7\25 简算
2\3+(4\7+1\2)*7\25 简算
2\3+(4\7+1\2)*7\25 简算
2/3+(4/7+1/2)×7/25
=2/3+(8/14+7/14)×7/25
=2/3+15/14 × 7/25
=2/3+3/10
=20/30+9/30
=29/30