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> 已知5=a,则515-5445+45=______.(用含a的代数式表示)-数学
已知5=a,则515-5445+45=______.(用含a的代数式表示)-数学
题目简介
已知5=a,则515-5445+45=______.(用含a的代数式表示)-数学
题目详情
已知
5
=a,则5
1
5
-
5
4
4
5
+
45
=______.(用含a的代数式表示)
题型:填空题
难度:中档
来源:不详
答案
原式=
5
-
5
2
+3
5
=
7
5
2
=
class="stub"7
2
a.
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题目简介
已知5=a,则515-5445+45=______.(用含a的代数式表示)-数学
题目详情
答案