diff --git a/DEV1.1/TP04/extrmites.c b/DEV1.1/TP04/extrmites.c
new file mode 100644
index 0000000..c767cb1
--- /dev/null
+++ b/DEV1.1/TP04/extrmites.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+  printf("%f\n", +1.0/0.0);
+  printf("%f\n", -1.0/0.0);
+  printf("%f\n", -0.0/0.0);
+  return EXIT_SUCCESS;
+}
\ No newline at end of file
diff --git a/DEV1.1/TP04/operation.c b/DEV1.1/TP04/operation.c
new file mode 100644
index 0000000..08d214e
--- /dev/null
+++ b/DEV1.1/TP04/operation.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+  printf("%f\n", 5.0+2.5);
+  printf("%f\n", 5.0-2.5);
+  printf("%f\n", 5.0*2.5);
+  printf("%f\n", 5.0/2.5);
+  printf("%f\n", 5.0/2.5);
+  return EXIT_SUCCESS;
+}
\ No newline at end of file
diff --git a/DEV1.1/TP04/poussières.c b/DEV1.1/TP04/poussières.c
new file mode 100644
index 0000000..08d214e
--- /dev/null
+++ b/DEV1.1/TP04/poussières.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+  printf("%f\n", 5.0+2.5);
+  printf("%f\n", 5.0-2.5);
+  printf("%f\n", 5.0*2.5);
+  printf("%f\n", 5.0/2.5);
+  printf("%f\n", 5.0/2.5);
+  return EXIT_SUCCESS;
+}
\ No newline at end of file
diff --git a/DEV1.1/TP04/telescopage.c b/DEV1.1/TP04/telescopage.c
new file mode 100644
index 0000000..da93945
--- /dev/null
+++ b/DEV1.1/TP04/telescopage.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+    int n;
+  double x;
+  printf("Entrez un réel : ");
+  n = scanf("%lf", &x);
+  printf("notation scentifique: %f\n", x*x);
+  return EXIT_SUCCESS;
+}
\ No newline at end of file