问题 解答题
计算下面各题,能简算的要简算.
5
6
-
3
8
)×48
3200÷(1280-72×15)
5.89+8.17+2.83+4.11
7
8
÷[(
1
2
+
3
5
)×
5
11
].
答案

①(

5
6
-
3
8
)×48,

=

5
6
×48-
3
8
×48,

=40-18,

=22;

②3200÷(1280-72×15),

=3200÷(1280-1080),

=3200÷200,

=16;

③5.89+8.17+2.83+4.11,

=(5.89+4.11)+(8.17+2.83),

=10+11,

=21;

7
8
÷[(
1
2
+
3
5
)×
5
11
],

=

7
8
÷[
11
10
×
5
11
],

=

7
8
÷
1
2

=

7
4

选择题
问答题