(1)
1
2 ÷(
5
6 ×9)
=
1
2 ÷
15
2 ,
=
1
15 .
答:商是
1
15 .
(2)(18.5×
4
5 -2) ÷
8
9 .
=(14.8-2)×
9
8 ,
=12.8×
9
8 ,
=14.4.
答:这个数为14.4.
(1)
1
2 ÷(
5
6 ×9)
=
1
2 ÷
15
2 ,
=
1
15 .
答:商是
1
15 .
(2)(18.5×
4
5 -2) ÷
8
9 .
=(14.8-2)×
9
8 ,
=12.8×
9
8 ,
=14.4.
答:这个数为14.4.