(-5)-(+3)+(-9)-(-7)+2/1=?
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(-5)-(+3)+(-9)-(-7)+2/1=?(-5)-(+3)+(-9)-(-7)+2/1=?(-5)-(+3)+(-9)-(-7)+2/1=?(-5)-(+3)+(-9)-(-7)+2/1=-
(-5)-(+3)+(-9)-(-7)+2/1=?
(-5)-(+3)+(-9)-(-7)+2/1=?
(-5)-(+3)+(-9)-(-7)+2/1=?
(-5)-(+3)+(-9)-(-7)+2/1=-5-3-9+7+2=-8
(3/7)×(4/9)+(5/9)×(3/7)怎么简算
(5/6-3/9)*(0.25+5/7)
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24点 (1)1 1 9 8 (2)9 9 5 7 (3)9 9 9 7
(x-5)×7/9=3/5x+5
(x-5)×7/9=3x/5+5
(x-5)×7/9=3x/5+5
(5/12-7/9-2/3)/(-1/36)
(3x+9)(7x+5)
(-5)-(+3)+(-9)-(-7)+2/1=?
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