来自宋贵宝的问题
下面各题,怎样算简便就怎样算.12×3.2+5.6×0.5+1.2×50%1110-14-34+910415÷(139-23×56)(12+13)÷35-1718.
下面各题,怎样算简便就怎样算.
12×3.2+5.6×0.5+1.2×50%
1110-14-34+910
415÷(139-23×56)
(12+11100)÷11101-11102.


下面各题,怎样算简便就怎样算.12×3.2+5.6×0.5+1.2×50%1110-14-34+910415÷(139-23×56)(12+13)÷35-1718.
下面各题,怎样算简便就怎样算.
12×3.2+5.6×0.5+1.2×50%
1110-14-34+910
415÷(139-23×56)
(12+11100)÷11101-11102.
(1)12×3.2+5.6×0.5+1.2×50%=0.5×3.2+5.6×0.5+1.2×0.5=(3.2+5.6+1.2)×0.5=10×0.5=5;(2)1110-14-34+910=(1110+910)-(14+34)=2-1=1;(3)415÷(139-23×56)=415÷(139-59)=415÷89=310;(4)...