(-16)×(1′2减1′4+1′8)×0.5时 用简便运算怎么写(-16)×(1′2-1′4+1′8)×0.5时 怎么简便运算

问题描述:

(-16)×(1′2减1′4+1′8)×0.5时 用简便运算怎么写
(-16)×(1′2-1′4+1′8)×0.5时 怎么简便运算

(-16)×(1′2-1′4+1′8)×0.5=-16X0.5X1'6=-8X1'6=-8'48

看不懂 (-16)?

(-16)×(1′2-1′4+1′8)×0.5
=(-16×0.5)×(1′2-1′4+1′8)
=(-8)×(1′2-1′4+1′8)
=(-8)×1′2-(-8)×1′4+(-8)×1′8
=-4+2-1
=-3