问题 解答题
2
3
+
1
4
÷
3
4
+
1
4
=
15÷
1
15
×
1
15
=
0.125÷
1
8
÷
7
9
=
8
9
÷
1
18
=
0.68+
2
3
+0.32
=
2
5
×5÷
2
5
×5
=
5
7
×10+10×
2
7
=
0.33=
1÷7×24=5-1.4-1.6=
答案

(1)

2
3
+
1
4
÷
3
4
+
1
4

=

3
4
+
1
3
+
1
4

=1

1
4

(2)15÷

1
15
×
1
15

=15×15×

1
15

=15;

(3)0.125÷

1
8
÷
7
9

=

1
8
×
9
7

=1

2
7

(4)

8
9
÷
1
18
=0;

(5)0.68+

2
3
+0.32,

=(0.68+0.32)+

2
3

=1+

2
3

=1

2
3

(6)

2
5
×5÷
2
5
×5,

=

2
5
×5×
5
2
×5,

=25;

(7)

5
7
×10+10×
2
7

=(

5
7
+
2
7
)×10,

=1×10,

=10;

(8)0.33

=0.3×0.3×0.3,

=0.027;

(9)1÷7×24,

=

1
7
×24,

=3

3
7

(10)5-1.4-1.6,

=5-(1.4+1.6),

=5-3,

=2.

选择题
单项选择题