问题 解答题
用简便方法计算
(1)6.35-
5
7
+4.65-
2
7
=
(2)
8
13
÷
7+
1
7
×
5
13
=
(3)
3
4
×
0.25×
4
3
×4=
答案

(1)6.35-

5
7
+4.65-
2
7

=6.35+4.65-(

5
7
+
2
7
),

=11-1,

=10;

(2)

8
13
÷7+
1
7
×
5
13
=

=

8
13
×
1
7
+
1
7
×
5
13

=(

8
13
+
5
13
)×
1
7

=1×

1
7

=

1
7

(3)

3
4
×0.25×
4
3
×4

=(

3
4
×
4
3
)×(0.25×4),

=1×1,

=1.

单项选择题
单项选择题