(1)12÷(
1
3 -25%),
=12÷(
1
3 -
1
4 ),
=12÷
1
12 ,
=12×12,
=144.
答:甲数是144.
(2)4×
1
8 ÷20%,
=
1
2 ÷0.2,
=0.5÷0.2,
=2.5.
答:这个数是2.5.
(1)12÷(
1
3 -25%),
=12÷(
1
3 -
1
4 ),
=12÷
1
12 ,
=12×12,
=144.
答:甲数是144.
(2)4×
1
8 ÷20%,
=
1
2 ÷0.2,
=0.5÷0.2,
=2.5.
答:这个数是2.5.