问题
解答题
1÷(6-1.25×0.8)
(
|
答案
(1)1÷(6-1.25×0.8),
=1÷(6-1),
=1÷5,
=0.2;
(2)
÷(2 15
+19 21
)×3 7
,1 2
=
÷2 15
×4 3
,1 2
=
×2 15
×3 4
,1 2
=
;1 20
(3)(
-7 8
)×(7 16
+5 9
),1 3
=
×7 16
,8 9
=
.7 18