怎样简便就怎样计算. 355+260+140+245 99×21 48×125 645-180-245 38×99+38 3500÷14÷5
怎样简便就怎样计算.355+260+140+24599×2148×125645-180-24538×99+383500÷14÷517×23-23×1750×25×20×4...
怎样简便就怎样计算. 355+260+140+245 99×21 48×125 645-180-245 38×99+38 3500÷14÷5 17×23-23×17 50×25×20×40 29×8+12×29+76.
展开
1个回答
展开全部
(1)355+260+140+245 =(355+245)+(260+140) =600+400 =1000 (2)99×21 =(100-1)×21 =100×21-21 =2100-21 =2079 (3)48×125 =6×8×125 =6×(8×125) =6×1000 =6000 (4)645-180-245 =(645-245)-180 =400-180 =220 (5)38×99+38 =38×(99+1) =38×100 =3800 (6)3500÷14÷5 =3500÷(14×5) =3500÷70 =50 (7)17×23-23×17 =17×(23-23) =17×0 =17 (8)50×25×20×40 =(50×20)×(25×40) =1000×1000 =1000000 (9)29×8+12×29+76 =29×(8+12)+76 =29×20+76 =580+76 =656 |
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