3,6*42,3*3,75-12,5*0,425*28
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![3,6*42,3*3,75-12,5*0,425*28](/uploads/image/z/4359205-37-5.jpg?t=3%2C6%2A42%2C3%2A3%2C75-12%2C5%2A0%2C425%2A28)
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3,6*42,3*3,75-12,5*0,425*28
3,6*42,3*3,75-12,5*0,425*28
3,6*42,3*3,75-12,5*0,425*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