计算下面各题，能简算的要简算．
75﹣15.38+61.25﹣4.62 765×64×0.5×2.5×0.125
50×96+57×4+7×66 0.0495×2500+495×0.24+51×4.95
计算下面各题，能简算的要简算．
75﹣15.38+61.25﹣4.62 765×64×0.5×2.5×0.125
50×96+57×4+7×66 0.0495×2500+495×0.24+51×4.95
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+
=
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=
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+
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×
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