(1)1÷(1.6×0.5),
=1÷0.8,
=1.25;
答:商是1.25.
(2)(2.6×4+10)÷2,
=(10.4+10)÷2,
=20.4÷2,
=10.2;
答:这个数是10.2.
(3)(32.8+3.6)÷4,
=36.4÷4,
=9.1;
答:乙数是9.1.
(4)80.5÷(3+
),1 2
=80.5÷3.5,
=23;
答:这个数是23.
(5)(10.1+24.35)÷13×0.6,
=34.45÷13×0.6,
=2.65×0.6,
=1.59;
答:积是1.59.
(6)16×2÷3.2-4.6,
=32÷3.2-4.6,
=10-4.6,
=5.4(米).
答:下底是5.4米.