(浙江)求x的值 :12=:x x﹣0.15x=8.5 3.6:x=.
计算: (1)73× (2) 166÷41
计算:(1)×37(2)2004×
计算:
计算:(1998+19981998+199819981998+…)÷(1999+19991999+199919991999…)×1999