问题 解答题
脱式计算(能简算的要简算)
7
18
×
1
4
+
3
4
×
7
18
7
10
×
5
16
÷
21
32
2-
3
8
÷
7
16
-
1
7
7
13
÷7+
1
7
×
6
13
答案

7
18
×
1
4
+
3
4
×
7
18

=

7
18
×(
1
4
+
3
4
),

=

7
18
×1,

=

7
18

7
10
×
5
16
÷
21
32

=

7
10
×
5
16
×
32
21

=

1
3

③2-

3
8
÷
7
16
-
1
7

=2-

3
8
×
16
7
-
1
7

=2-

6
7
-
1
7

=2-(

6
7
+
1
7
),

=2-1,

=1;

7
13
÷7+
1
7
×
6
13

=

7
13
×
1
7
+
1
7
×
6
13

=

1
7
×(
7
13
+
6
13
),

=

1
7
×1,

=

1
7

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