问题
解答题
计算下面各题:
|
答案
(1)2011+450÷15×30,
=2011+30×30,
=2011+900,
=2911;
(2)10÷
×5 8
,4 15
=16×
,4 15
=
;64 15
(3)
÷6+9 20
×1 6
,1 20
=
×9 20
+1 6
×1 6
,1 20
=(
+9 20
)×1 20
,1 6
=
×1 2
,1 6
=
;1 12
(4)
÷[9 10
×(1 2
-6 5
)],3 10
=
÷[9 10
×1 2
],9 10
=
÷9 10
,9 20
=2.