(-1)×2×(-3)×4 (-12)×(-1.25)×(-3分之1)×0.8

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(-1)×2×(-3)×4 (-12)×(-1.25)×(-3分之1)×0.8
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(-1)×2×(-3)×4 (-12)×(-1.25)×(-3分之1)×0.8
(-1)×2×(-3)×4 (-12)×(-1.25)×(-3分之1)×0.8

(-1)×2×(-3)×4 (-12)×(-1.25)×(-3分之1)×0.8