题目内容

脱式计算(能简算6要简算)
27
×人6+人6×
22
27

2
×
6
7
+
a
7
÷
2

③[2-(1+
2
a
)]÷
2
7

④(
6
-
a
6
7
68
+
12
7

5
27
×5i+5i×
22
27

=(
5
27
+
22
27
)×5i,
=5i;

2
5
×
i
7
+
3
7
÷
5
2

=
2
5
×
i
7
+
3
7
×
2
5

=
2
5
×(
i
7
+
3
7
)

=
2
5


[2-(1+
2
3
)]÷
2
7

=[2-1
2
3
2
7

=
1
3
÷
2
7

=
7
g


(
5
g
-
3
i
7
i8
+
12
7

=
1
12
÷
7
i8
+
12
7

=
i
7
+
12
7

=
1g
7
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