125+2.125+3.125.+80.125 (要写过程)

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125+2.125+3.125.+80.125(要写过程)125+2.125+3.125.+80.125(要写过程)125+2.125+3.125.+80.125(要写过程)原式=125+2.125+

125+2.125+3.125.+80.125 (要写过程)
125+2.125+3.125.+80.125 (要写过程)

125+2.125+3.125.+80.125 (要写过程)
原式=125+2.125+2.125+1+2.125+2.2.125+78
=125+2.125x(1+78)+(1+2+3+4+5+6.+78)
=125+2.125x79+(1+78)÷2x78
=125+167.875+3081
=3373.875
嘿嘿.