问题
解答题
|
答案
(1)6.4÷
×8 9
,5 24
=
×32 5
×9 8
,5 24
=
;3 2
(2)
×5 42
÷24 25
,36 35
=
×5 42
×24 25
,35 36
=
;1 9
(3)(4-0.4)×(
+2 9
),2 3
=3.6×
,8 9
=3.2;
(4)
÷10 19
×3 4
,38 5
=
×10 19
×4 3
,38 5
=
;16 3
(5)0.9×31-0.9×1,
=0.9×(31-1),
=0.9×30,
=27;
(6)[
-(3 8
+1 6
)]÷1 3
,1 12
=[
-3 8
]÷1 2
,1 12
=-
×12,1 8
=-
.3 2