题目内容

脱式计算
①907×99×907
②(
4
5
+
1
4
)÷
7
3
+
7
10

③(0.125×8-0.5)×4
④[1-(
1
2
-
1
4
)]×
2
3
①907×99×907
=89793×907
=81442251;
②(
4
5
+
1
4
)÷
7
3
+
7
10

=
21
20
×
3
7
+
7
10

=
9
20
+
14
20

=1
3
20

③(0.125×8-0.5)×4
=(1-0.5)×4
=0.5×4
=2;
④[1-(
1
2
-
1
4
)]×
2
3

={1-
1
4
2
3

=
3
4
×
2
3

=
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