问题 解答题
能简算的要简算
2.9÷8+1.1×
1
8

13
5
×8×
8
13
×1.25
1
4
+
5
7
)×28
3
4
÷3-
1
10
)×
1
3
答案

(1)2.9÷8+1.1×

1
8

=(2.9+1.1)×

1
8

=4×

1
8

=

1
2

(2)

13
5
×8×
8
13
×1.25,

=(

13
5
×
8
13
)×(8×1.25),

=1.6×10,

=16;

(3)(

1
4
+
5
7
)×28,

=

1
4
×28+
5
7
×
28,

=7+20,

=27;

(4)(

3
4
÷3-
1
10
)×
1
3

=(

3
4
×
1
3
-
1
10
)×
1
3

=

3
20
×
1
3

=

1
20

单项选择题
单项选择题