(1)60÷(
1
5 -
6 ),
=60÷
30 ,
=60×30,
=1800;
答:这个数是1800.
(2)15×
4
5 +
3
8 ÷
24 ,
=12+
8 ×24,
=12+9,
=21;
答:和是21.