简算.9/25×17/26+13/25×7/26
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简算.9/25×17/26+13/25×7/26
简算.9/25×17/26+13/25×7/26
简算.9/25×17/26+13/25×7/26
9/25×17/26+13/25×7/26
=1/25×1/26×(9×17+13×7)
=1/25×1/26×(153+91)
=1/25×1/26×244
=1/25×1/13×122
=122/325
只能这样最简了!
(9x26+17x25+13x26+7x25)/(25x26)=(22x26+24x25)/(25x26)=(11x26+12x25)/(25x13)
=586/325