几道数学题,要递等式(拖式计算)写出来

问题描述:

几道数学题,要递等式(拖式计算)写出来
(111+999)/〖56*(3/7-3/8)〗
200.5%+2.005*490+0.2005*5000
3333*3333+9999*8889
1/1*4+1/4*7+1/7*10+……+1/97*100

(111+999)/〖56*(3/7-3/8)〗 =111(1+9)/〔24-21〕 =1110 /3 =370 200.5%+2.005*490+0.2005*5000 =2.005+2.005×490+2.005×500 =2.005×(10+490+500) =2.005×1000 =20053333*3333+9999*8889 =333...