-3.14*35.2+6.28*(-23.3)-1.57*36.4
=-(3.14*35.2+6.28*23.3+1.57*36.4)
=-[3.14*35.2+3.14*2*23.3+(3.14/2)*36.4]
=-3.14*(35.2+46.6+18.2)
=-3.14*100
=-314
也可以提1.57为公因子,一样的. -3.14*35.2+6.28*(-23.3)-1.57*36.4
=-(3.14*35.2+6.28*23.3+1.57*36.4)
=-[3.14*35.2+3.14*2*23.3+(3.14/2)*36.4]
=-3.14*(35.2+46.6+18.2)
=-3.14*100
=-314
也可以提1.57为公因子,一样的. -3.14*35.2+6.28*(-23.3)-1.57*36.4
=-3.14*35.2+3.14*2*(-23.3)-1.57*2*18.2
=-3.14*35.2+3.14*(-46.6)-3.14*18.2
=-3.14*(35.2+46.6+18.2)
=-3.14*100
=-314 -3.14*(35.2+2*23.3+0.5*36.4)=-3.14*100=-314 -3.14*35.2+6.28*(-23.3)-1.57*36.4
=-1.57*35.2*2+1.57*(-23.3*4)-1.57*36.4
=1.57*(-35.2*2-23.3*4-36.4)
=-1.57*(70.4+93.2+36.4)
=-1.57*200
=-314
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