(-16)*21/4-(-4)*(-21/2)*(-1)+(-8)*(-12)*(-0.125)
1个回答
(-16)*21/4-(-4)*(-21/2)*(-1)+(-8)*(-12)*(-0.125)
=-4*21+2*21-12
=(-4+2)*21-12
=-2*21-12
=-42-12
=-54
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