简便计算 654321×909090+654321×909090 9×17+91÷27-5×17+79÷17

问题描述:

简便计算 654321×909090+654321×909090 9×17+91÷27-5×17+79÷17

654321x909090+654321x90909=654321x(909090+90909)=654321x999999=654321x(1000000-1)=6543203456799×17+91÷17-5×17﹢45÷17=(9-5)×17+(45+91)÷17=4×17+136÷17=68+8=76这是我在静心思考后得出的结论,如...