问题 解答题
脱式计算,能简算的要简算.
(1)(
5
6
+
7
12
+
3
8
)÷
1
48

(2)[1-(
1
2
+
1
3
)×
1
5
5
6

(3)6.46-(5.37-3.54)
(4)5.58-
3
5
+5.42-
2
5
答案

(1)(

5
6
+
7
12
+
3
8
)÷
1
48

=(

5
6
+
7
12
+
3
8
)×48,

=

5
6
×48+
7
12
×48+
3
8
×48,

=40+28+18,

=86;

(2)[1-(

1
2
+
1
3
)×
1
5
5
6

=[1-(

3
6
+
2
6
)×
1
5
6
5

=[1-

5
6
×
1
5
6
5

=[1-

1
6
6
5

=

5
6
×
6
5

=1;

(3)6.46-(5.37-3.54),

=6.46-5.37+3.54,

=(6.46+3.54)-5.37,

=10-5.37,

=4.63;

(4)5.58-

3
5
+5.42-
2
5

=(5.58+5.42)-(

3
5
+
2
5
),

=11-1,

=10.

单项选择题
单项选择题 A1/A2型题