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太多了,這裡寫一點.簡算(含一巧算):4.85*0.17+0.485*8.3、9+99+999+9999+99999、100000/125/32、1+2+3+4+…+98+99+100、19+299+3999+49999+…+9999999999、1.2*8+0.6*16簡易方程:x+y=120,5x=y,3x+6y=?拖式計算…
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