题目内容

计算题.
(1)
(-144)×(-169)

(2)4
5
+
45
-
8
+4
2

(3)(
2
+1)(2-
2
)

(4)(
3
+1)2-2
48
(1)
(-144)×(-169)

=
144×169

=
144
×
169

=12×13
=276;
(2)4
5
+
45
-
8
+4
2

=4
5
+3
5
-2
2
+4
2

=7
5
+2
2

(3)(
2
+1)(2-
2

=2
2
-(
2
2+2-
2

=2
2
-2+2-
2

=
2

(4)(
3
+1)2-2
48

=(
3
2+2
3
+1-8
3

=3+2
3
+1-8
3

=4-6
3
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