问题 解答题
下面各题怎样简便就怎样算.
46.7-15.03-4.9712.8-3.68÷2.3
11
12
-
3
4
)÷(1+
1
2
85×0.75+
3
4
×15
1
3
÷[(
2
3
+0.2)×
1
13
].
答案

(1)46.7-15.03-4.97,

=46.7-(15.03+4.97),

=46.7-20,

=26.7;

(2)12.8-3.68÷2.3,

=12.8-1.6,

=11.2;

(3)(

11
12
-
3
4
)÷(1+
1
2
),

=

1
6
÷
3
2

=

1
9

(4)85×0.75+

3
4
×15,

=(85+15)×

3
4

=100×

3
4

=75.

单项选择题
单项选择题 A1/A2型题