Excel自动生成100以内加减混合运算带括号?答:=CHOOSE(RANDBETWEEN(1,4),RANDBETWEEN(10,40)&"+("&RANDBETWEEN(10,30)&"+"&RANDBETWEEN(10,30)&")",RANDBETWEEN(10,30)&"+("&RANDBETWEEN(50,99)&"-"&RANDBETWEEN(30,50)&")",RANDBETWEEN(60,99)&"-("&RANDBETWEEN(10,30)&"+"&RANDBETWEEN(10,30)&")",RANDBETWEEN(60,99)&"...