diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/10.es/textbook.fr.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/10.es/textbook.fr.md
index 23a21770e..ecbe51bc1 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/10.es/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/10.es/textbook.fr.md
@@ -10,7 +10,7 @@ lessons:
       order: 2
 ---
 
-### Definir las herramientas matemáticas necesarias en cada nivel
+#### Definir las herramientas matemáticas necesarias en cada nivel
 
 --------------------