(1)(
1
4 -
1
8 )÷(
1
4 +
1
8 ),
=
1
8 ÷
3
8 ,
=
1
3 .
答:商是
1
3 .
(2)设这个数为x,可得方程:
8x+6.8=74×60%.
8x+6.8=44.4,
8x=37.6,
x=4.7.
答:这个数是4.7.
(1)(
1
4 -
1
8 )÷(
1
4 +
1
8 ),
=
1
8 ÷
3
8 ,
=
1
3 .
答:商是
1
3 .
(2)设这个数为x,可得方程:
8x+6.8=74×60%.
8x+6.8=44.4,
8x=37.6,
x=4.7.
答:这个数是4.7.