12.8-0.5×0.5-0.75 用简便方法计算该怎么算呢?

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12.8-0.5×0.5-0.75用简便方法计算该怎么算呢?12.8-0.5×0.5-0.75用简便方法计算该怎么算呢?12.8-0.5×0.5-0.75用简便方法计算该怎么算呢?12.8-0.5×0

12.8-0.5×0.5-0.75 用简便方法计算该怎么算呢?
12.8-0.5×0.5-0.75 用简便方法计算该怎么算呢?

12.8-0.5×0.5-0.75 用简便方法计算该怎么算呢?
12.8-0.5×0.5-0.75
=12.8-0.25-0.75
=12.8-(0.25+0.75)
=12.8-1
=11.8