(1)[1/4]×12÷(18×[5/6]),
=3÷15,
=[1/5];
答:商是[1/5].
(2)设这个数为x,
[1/5]x-[1/6]x=60,
([1/5]-[1/6])x=60,
[1/30]x=60,
x=60÷
1
30,
x=1800;
答:这个数是1800.
(1)[1/4]×12÷(18×[5/6]),
=3÷15,
=[1/5];
答:商是[1/5].
(2)设这个数为x,
[1/5]x-[1/6]x=60,
([1/5]-[1/6])x=60,
[1/30]x=60,
x=60÷
1
30,
x=1800;
答:这个数是1800.