运用简便方法计算: (1)(-0.25)×0.5×(-100)×4;(2)(-5)×3 +2×3 +(-6)×3 ;(3)(-...

2025-02-24 10:47:08
推荐回答(1个)
回答1:

解:(l)原式=0.25×4×0.5×100= 50
(2)原式=(-5+2-6)× =(-9)× = -30
(3)原式=(-105- )×12        
=(-105)×12- ×12        
=-1260-10
=-1270