问题 解答题
计算(能简算的要简算)
5
6
-
3
7
)×42
4
25
÷[(
2
5
+
1
3
)×
9
11
]
2
29
+
3
23
)×29×23
5
6
÷[
1
6
÷(
3
4
-
2
3
)].
答案

(1)(

5
6
-
3
7
)×42,

=

5
6
×42-
3
7
×42,

=35-18,

=17;

(2)

4
25
÷[(
2
5
+
1
3
)×
9
11
],

=

4
25
÷[
11
15
×
9
11
],

=

4
25
÷
3
5

=

4
15

(3)(

2
29
+
3
23
)×29×23,

=(

2
29
+
3
23
)×(29×23),

=

2
29
×(29×23)+
3
23
×(29×23),

=

2
29
×29×23+
3
23
×23×29,

=2×23+3×29,

=46+87,

=133;

(4)

5
6
÷[
1
6
÷(
3
4
-
2
3
)],

=

5
6
÷[
1
6
÷
1
12
],

=

5
6
÷2,

=

5
12

单项选择题
单项选择题