问题
解答题
|
答案
(1)4920÷24-17×12,
=205-204,
=1;
(2)0.25×6.7×4,
=0.25×4×6.7,
=1×6.7,
=6.7;
(3)168.1÷(4.3×2-0.4),
=168.1÷(8.6-0.4),
=168.1÷8.2,
=20.5;
(4)
-(2 3
-5 6
)÷3 4
,3 8
=
-2 3
÷1 12
,3 8
=
-2 3
,2 9
=
;4 9
(5)
×5 4
-8 9
×1 4
,8 9
=(
-5 4
)×1 4
,8 9
=1×
,8 9
=
;8 9
(6)
÷[(1-15 7
)÷5 8
],2 8
=
÷[15 7
÷3 8
],2 8
=
÷15 7
,3 2
=
.10 7