计算下面各题,能简算的要简算. 4.05-2.8-0.7 1.25×32×2.5 [1-( 1 2 - 1 4
计算下面各题,能简算的要简算.4.05-2.8-0.71.25×32×2.5[1-(12-14)]×2399.9×98+(0.8-35)×999....
计算下面各题,能简算的要简算. 4.05-2.8-0.7 1.25×32×2.5 [1-( 1 2 - 1 4 )]× 2 3 99.9×98+(0.8- 3 5 )×999.
展开
1个回答
展开全部
(1)4.05-2.8-0.7 =1.25-0.7, =0.55; (2)1.25×32×2.5 =1.25×8×4×2.5, =(1.25×8)×(4×2.5), =10×10, =100; (3)[1-(
=[1-(
=[1-
=
=
(4)99.9×98+(0.8-
=999×9.8+(0.8-0.6)×999, =999×9.8+0.2×999, =999×(9.8+0.2), =999×10, =9990. |
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询