(1)42-42×
1
6 ,
=42-7,
=35,
答:差是35;
(2)设这个数是x,
5 ÷
1
5 =
1
3 x-2,
25+2=
1
3 x-2+2,
27=
1
3 x,
27 ÷
1
3 =
1
3 x ÷
1
3 ,
x=81.
答:这个数是81.
(1)42-42×
1
6 ,
=42-7,
=35,
答:差是35;
(2)设这个数是x,
5 ÷
1
5 =
1
3 x-2,
25+2=
1
3 x-2+2,
27=
1
3 x,
27 ÷
1
3 =
1
3 x ÷
1
3 ,
x=81.
答:这个数是81.