七上(-109/26)-(-431/104)-(+190/13)-(+163/52)简便运算
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![七上(-109/26)-(-431/104)-(+190/13)-(+163/52)简便运算](/uploads/image/z/432514-10-4.jpg?t=%E4%B8%83%E4%B8%8A%28-109%2F26%29-%28-431%2F104%29-%28%2B190%2F13%29-%28%2B163%2F52%29%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
七上(-109/26)-(-431/104)-(+190/13)-(+163/52)简便运算
七上(-109/26)-(-431/104)-(+190/13)-(+163/52)简便运算
七上(-109/26)-(-431/104)-(+190/13)-(+163/52)简便运算
原式=431/104-109/26-190/13-163/52
全部乘104
得
431-436-1520-326=-1821
再除以104
得
-1821/104