7142.85÷3.7÷2.7×1.7×0.7是奥赛简算题

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7142.85÷3.7÷2.7×1.7×0.7是奥赛简算题7142.85÷3.7÷2.7×1.7×0.7是奥赛简算题7142.85÷3.7÷2.7×1.7×0.7是奥赛简算题解析:7142.85÷3.

7142.85÷3.7÷2.7×1.7×0.7是奥赛简算题
7142.85÷3.7÷2.7×1.7×0.7
是奥赛简算题

7142.85÷3.7÷2.7×1.7×0.7是奥赛简算题
解析:7142.85÷3.7÷2.7×1.7×0.7
=7142.85÷37÷27×17×7
=7142.85×7÷999×17
=49999.95÷999×17
=50.05×17
=850.85

7142.85÷3.7÷2.7×1.7×0.7
=7142.85÷37÷27×17×7
=264.55÷37×17×7
=7.15×17×7
=7.15×119
=850.85

长见识了

原式=7142.85÷37÷27×17×7(同时乘除两个10,等式值不变)
=264.55÷37×17×7(7142.85÷7=264.55)
=7.15×17×7(264.55÷37=7.15)
=7.15×119(17×7=119)
=850.85