7142.85÷3.7÷2.7×1.7×0.799×1.01×77.78+66.66×33.33

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/27 17:51:12
7142.85÷3.7÷2.7×1.7×0.799×1.01×77.78+66.66×33.33
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7142.85÷3.7÷2.7×1.7×0.799×1.01×77.78+66.66×33.33
7142.85÷3.7÷2.7×1.7×0.7
99×1.01×77.78+66.66×33.33

7142.85÷3.7÷2.7×1.7×0.799×1.01×77.78+66.66×33.33
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
99×1.01×77.78+66.66×33.33
=99×(1+0.01)×77.78+33.33×(2+1)
=99.99×77.78+99.99
=99.99×78.78
=(100-0.01)×78.78
=7878-0.7878
=7877.2122