题目内容

①
10
21
×
12
25
②33×
7
32
③
5
8
×
9
4
×
16
45
④
4
5
-
1
2
×
2
3
⑤
7
4
×
1
9
+
1
4
×
1
9
⑥(
1
4
+
7
12
)×
3
5
①
10
21
×
12
25
=
8
35
;

②33×
7
32

=(32+1)×
7
32

=32×
7
32
+1×
7
32

=7+
7
32

=7
7
32
;

③
5
8
×
9
4
×
16
45

=
5
8
×
16
45
×
9
4
,
=
1
2
;

④
4
5
-
1
2
×
2
3

=
4
5
-
1
3
,
=
7
15
;

⑤
7
4
×
1
9
+
1
4
×
1
9

=(
7
4
+
1
4
)×
1
9
,
=2×
1
9
,
=
2
9
;

⑥(
1
4
+
7
12
)×
3
5

=
1
4
×
3
5
+
7
12
×
3
5
,
=
3
20
+
7
20
,
=
1
2
.
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网