diff --git a/reference/chrono/duration/op_modulo.md b/reference/chrono/duration/op_modulo.md
index 7f498d6c6..3320456f0 100644
--- a/reference/chrono/duration/op_modulo.md
+++ b/reference/chrono/duration/op_modulo.md
@@ -67,7 +67,7 @@ int main()
     std::cout << ms.count() << std::endl;
   }
 
-  // duration / duration
+  // duration % duration
   {
     seconds s = seconds(8) % seconds(3);
     std::cout << s.count() << std::endl;
diff --git a/reference/chrono/treat_as_floating_point.md b/reference/chrono/treat_as_floating_point.md
index f2182f942..82caf6408 100644
--- a/reference/chrono/treat_as_floating_point.md
+++ b/reference/chrono/treat_as_floating_point.md
@@ -36,13 +36,13 @@ int main()
   // floating point Rep
   static_assert(
     treat_as_floating_point<duration<double, std::ratio<1, 30>>::rep>::value,
-    "duration<double, ratio<1, 30>> > can't become floating point"
+    "duration<double, ratio<1, 30>> > must be floating point"
   );
 
   // integer Rep
   static_assert(
     !treat_as_floating_point<milliseconds::rep>::value,
-    "seconds can't become floating point"
+    "milliseconds can't become floating point"
   );
 }
 ```
diff --git a/reference/iterator/move_iterator/op_compare_3way.md b/reference/iterator/move_iterator/op_compare_3way.md
index 9ef855f71..34745f6fd 100644
--- a/reference/iterator/move_iterator/op_compare_3way.md
+++ b/reference/iterator/move_iterator/op_compare_3way.md
@@ -28,7 +28,6 @@ namespace std {
 #include <iostream>
 #include <vector>
 #include <memory>
-#include <algorithm>
 #include <iterator>
 
 int main()
diff --git a/reference/iterator/move_iterator/op_equal.md b/reference/iterator/move_iterator/op_equal.md
index 3ae76fd20..cf851262a 100644
--- a/reference/iterator/move_iterator/op_equal.md
+++ b/reference/iterator/move_iterator/op_equal.md
@@ -61,7 +61,6 @@ C++20以降、これらの演算子により以下の演算子が使用可能に
 #include <iostream>
 #include <vector>
 #include <memory>
-#include <algorithm>
 #include <iterator>
 
 int main()
diff --git a/reference/iterator/move_iterator/op_greater.md b/reference/iterator/move_iterator/op_greater.md
index 3ed2238c6..d6818b44d 100644
--- a/reference/iterator/move_iterator/op_greater.md
+++ b/reference/iterator/move_iterator/op_greater.md
@@ -32,7 +32,6 @@ namespace std {
 #include <iostream>
 #include <vector>
 #include <memory>
-#include <algorithm>
 #include <iterator>
 
 int main()
diff --git a/reference/iterator/move_iterator/op_greater_equal.md b/reference/iterator/move_iterator/op_greater_equal.md
index e21a2ad0b..701907db3 100644
--- a/reference/iterator/move_iterator/op_greater_equal.md
+++ b/reference/iterator/move_iterator/op_greater_equal.md
@@ -32,7 +32,6 @@ namespace std {
 #include <iostream>
 #include <vector>
 #include <memory>
-#include <algorithm>
 #include <iterator>
 
 int main()
diff --git a/reference/iterator/move_iterator/op_less.md b/reference/iterator/move_iterator/op_less.md
index 418cc24be..5e8eab85e 100644
--- a/reference/iterator/move_iterator/op_less.md
+++ b/reference/iterator/move_iterator/op_less.md
@@ -33,7 +33,6 @@ namespace std {
 #include <iostream>
 #include <vector>
 #include <memory>
-#include <algorithm>
 #include <iterator>
 
 int main()
diff --git a/reference/iterator/move_iterator/op_less_equal.md b/reference/iterator/move_iterator/op_less_equal.md
index b9e5c36b7..842d97962 100644
--- a/reference/iterator/move_iterator/op_less_equal.md
+++ b/reference/iterator/move_iterator/op_less_equal.md
@@ -32,7 +32,6 @@ namespace std {
 #include <iostream>
 #include <vector>
 #include <memory>
-#include <algorithm>
 #include <iterator>
 
 int main()
diff --git a/reference/iterator/move_iterator/op_minus.md b/reference/iterator/move_iterator/op_minus.md
index 44563d80d..bc320bfc3 100644
--- a/reference/iterator/move_iterator/op_minus.md
+++ b/reference/iterator/move_iterator/op_minus.md
@@ -52,7 +52,6 @@ namespace std {
 #include <iostream>
 #include <vector>
 #include <memory>
-#include <algorithm>
 #include <iterator>
 
 int main()
diff --git a/reference/iterator/move_iterator/op_not_equal.md b/reference/iterator/move_iterator/op_not_equal.md
index 70167b4a9..ef042e655 100644
--- a/reference/iterator/move_iterator/op_not_equal.md
+++ b/reference/iterator/move_iterator/op_not_equal.md
@@ -47,7 +47,6 @@ C++20以降、この演算子は[`operator==`](op_equal.md)によって使用可
 #include <iostream>
 #include <vector>
 #include <memory>
-#include <algorithm>
 #include <iterator>
 
 int main()
diff --git a/reference/ranges/input_range.md b/reference/ranges/input_range.md
index 4a718f0ca..3d25375cf 100644
--- a/reference/ranges/input_range.md
+++ b/reference/ranges/input_range.md
@@ -23,7 +23,6 @@ namespace std::ranges {
 ## 例
 ```cpp example
 #include <ranges>
-#include <forward_list>
 #include <iostream>
 
 int main() {