题目内容

直接写出答案
(1)8+98+998
(2)2
3
2008
-(
1
5
+1
3
2008
)
=
(3)12.5×5×0.16=
(4)
7
8
÷7=
(1)8+98+998,
=2+2+4+98+998,
=(2+98)+(2+998)+4,
=100+1000+4,
=1104;

(2)2
3
2008
-(
1
5
+1
3
2008
),
=2
3
2008
-
1
5
-1
3
2008

=2
3
2008
-1
3
2008
-
1
5

=1-
1
5

=
4
5


(3)12.5×5×0.16,
=12.5×5×(0.4×0.4),
=12.5×5×0.4×0.4,
=(12.5×0.4)×(5×0.4),
=5×2,
=10;

(4)
7
8
÷7,
=
7
8
×
1
7

=
1
8
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