計算：3.6×42.3×3.75-12.5×0.423×28=______.

計算：3.6×42.3×3.75-12.5×0.423×28=______.


3.6×42.3×3.75-12.5×0.423×28=3.6×42.3×1.25×3-1.25×10×42.3×0.28=42.3×1.25×（3.6×3-10×0.28）=42.3×1.25×（10.8-2.8）=42.3×1.25×8=42.3×（1.25×8）=42.3×10=423故答案為：423.



3,6*42,3*3,75-12,5*0425*28


3.6×42.3×3.75-12.5×0.423×28
=3.6×42.3×3.75-12.5×42.3×0.28
=42.3×1.25×（10.8-2.8）
=42.3×（1.25×8）
=423



975乘0.25+9又4/3乘76-9.75=
如題.請解答.


975乘0.25+9又4/3乘76-9.75
=9.75乘25+9.75乘76-9.75
=9.75乘（25+76-1）
=9.75乘100
=975

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