巧解密码:(1)(3x+2)+2[(x﹣1)﹣(2x+1)]=6(2)若x:7.5=0.16:,求75x+8的值.
计算: (1)73× (2) 166÷41
计算:(1)×37(2)2004×
计算:
计算:(1998+19981998+199819981998+…)÷(1999+19991999+199919991999…)×1999