数学计算题.要用简便计算..呵呵有点麻烦,写清楚就加分!
5×(3/5+2/7)×7
666×7+58×111
4/9×13+7/9÷1/13-13
1000÷0.4÷1.25÷8÷2.5
40/29×18-11×18/29+92
101×99×999+999
8又3/5×2.7+62×14%+35×0.86
121×27+121×60+121×16+79×91+12×79