问题 解答题
1.25÷2.5=36×(
3
4
+
5
6
)=
9
9
10
÷9=
1
5
÷
1
5
×5=
8-8÷9=
4
7
÷7=
答案

(1)1.25÷2.5=0.5;

(2)36×(

3
4
+
5
6

=36×

3
4
+36×
5
6

=27+30,

=57;

(3)9

9
10
÷9

=

99
10
×
1
9

=1

1
10

(4)5×

1
5
÷
1
5
×5

=

1
5
÷
1
5
×5×5,

=1×5×5,

=25;

(5)8-8÷9

=8-

8
9

=7

1
9

(6)

4
7
÷7=
4
49

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