一个长方形操场,长55米,宽35米.小华沿操场的边跑了两圈,跑了多少米?
(7.5+7.5+7.5+7.5)×125×4.
1999+999×999.
8888008×125.
3.75×4.23×36﹣125×0.423×2.8.
25×2.64+12.5×0.726+0.125.