diff --git a/content/es/apuntes-segundo-tercero-eso/actividad-cientifica/index.md b/content/es/apuntes-segundo-tercero-eso/actividad-cientifica/index.md
index af1398478..320728db6 100644
--- a/content/es/apuntes-segundo-tercero-eso/actividad-cientifica/index.md
+++ b/content/es/apuntes-segundo-tercero-eso/actividad-cientifica/index.md
@@ -175,20 +175,22 @@ donde $1 \leq a<10$ y $b$ puede ser cualquier número entero (positivo o negativ
 {{% callout example %}}
 <br>
 
-\begin{align*}
-	500 &\rightarrow 5\times 10^2 \\\\
-	520 &\rightarrow 5.2\times 10^2 \\\\
-	600000 &\rightarrow 6\times 10^5 \\\\
-	30000000 &\rightarrow 3\times 10^7 \\\\
-	500 000 000 000 000 &\rightarrow 5\times 10^{14} \\\\
-	7 000 000 000 000 000 000 000 000 &\rightarrow 7\times 10^{24} \\\\
-	0.05 &\rightarrow 5\times 10^{-2} \\\\
-	0.052 &\rightarrow 5.2\times 10^{-2} \\\\
-	0.0004 &\rightarrow 4\times 10^{-4} \\\\
-	0.000 000 01 &\rightarrow 1\times 10^{-8} \\\\
-	0.000 000 000 000 000 6 &\rightarrow 6\times 10^{-16} \\\\
+$$
+\begin{aligned}
+	500 &\rightarrow 5\times 10^2 \\
+	520 &\rightarrow 5.2\times 10^2 \\
+	600000 &\rightarrow 6\times 10^5 \\
+	30000000 &\rightarrow 3\times 10^7 \\
+	500 000 000 000 000 &\rightarrow 5\times 10^{14} \\
+	7 000 000 000 000 000 000 000 000 &\rightarrow 7\times 10^{24} \\
+	0.05 &\rightarrow 5\times 10^{-2} \\
+	0.052 &\rightarrow 5.2\times 10^{-2} \\
+	0.0004 &\rightarrow 4\times 10^{-4} \\
+	0.000 000 01 &\rightarrow 1\times 10^{-8} \\
+	0.000 000 000 000 000 6 &\rightarrow 6\times 10^{-16} \\
 	0.000 000 000 000 000 000 000 000 8 &\rightarrow 8\times 10^{-25}
-\end{align*}
+\end{aligned}
+$$
 {{% /callout %}}
 
 ### Factores de conversión
@@ -199,18 +201,20 @@ Se trata de multiplicar por fracciones utilizando la conversión entre unidades.
 {{% callout example %}}
 <br>
 
-\begin{align*}
-13\thinspace\mathrm{cg} & \longrightarrow \mathrm{hg} \\\\
-13\thinspace\cancel{\mathrm{cg}} & \cdot \frac{1\thinspace\cancel{\mathrm g}}{10^2\thinspace\cancel{\mathrm{cg}}} \cdot \frac{1\thinspace\mathrm{hg}}{10^2\thinspace\cancel{\mathrm{g}}} = 1.3\times 10^{-3}\thinspace\mathrm{hg} \\\\ \\\\
-3\thinspace\mathrm{dam^2} &\longrightarrow \mathrm{mm^2} \\\\
-3\thinspace\cancel{\mathrm{dam^2}} &\cdot \frac{10^2\thinspace\cancel{\mathrm{m^2}}}{1\thinspace\cancel{\mathrm{dam^2}}} \cdot \frac{10^6\thinspace\mathrm{mm^2}}{1\thinspace\cancel{\mathrm{m^2}}} = 3\times 10^{8}\thinspace\mathrm{mm^2} \\\\ \\\\
-72\thinspace\mathrm{km/h} &\longrightarrow \mathrm{m/s} \\\\
-72\thinspace\frac{\cancel{\mathrm{km}}}{\cancel{\mathrm{h}}} &\cdot \frac{10^3\thinspace\mathrm{m}}{1\thinspace\cancel{\mathrm{km}}} \cdot \frac{1\thinspace\cancel{\mathrm{h}}}{3600\thinspace\mathrm{s}} = 20\thinspace\mathrm{m/s} \\\\ \\\\
-24\thinspace\mathrm{g/cm^3} &\longrightarrow \mathrm{\mu g/\mu L} \\\\
-24\thinspace\frac{\cancel{\mathrm g}}{\cancel{\mathrm{cm^3}}} &\cdot \frac{10^6\thinspace\mathrm{\mu g}}{1\thinspace\cancel{\mathrm{g}}} \cdot \frac{10^3\thinspace\cancel{\mathrm{cm^3}}}{1\thinspace\cancel{\mathrm{dm^3}}} \cdot \frac{1\thinspace\cancel{\mathrm{dm^3}}}{1\thinspace\cancel{\mathrm{L}}} \cdot \frac{1\thinspace\cancel{\mathrm{L}}}{10^6\thinspace\mathrm{\mu L}} = 2.4 \times 10^4\thinspace\mathrm{\mu g/\mu L} \\\\ \\\\
-5\thinspace\mathrm{L/s} &\longrightarrow \mathrm{m^3/h} \\\\
+$$
+\begin{aligned}
+13\thinspace\mathrm{cg} & \longrightarrow \mathrm{hg} \\
+13\thinspace\cancel{\mathrm{cg}} & \cdot \frac{1\thinspace\cancel{\mathrm g}}{10^2\thinspace\cancel{\mathrm{cg}}} \cdot \frac{1\thinspace\mathrm{hg}}{10^2\thinspace\cancel{\mathrm{g}}} = 1.3\times 10^{-3}\thinspace\mathrm{hg} \\ \\
+3\thinspace\mathrm{dam^2} &\longrightarrow \mathrm{mm^2} \\
+3\thinspace\cancel{\mathrm{dam^2}} &\cdot \frac{10^2\thinspace\cancel{\mathrm{m^2}}}{1\thinspace\cancel{\mathrm{dam^2}}} \cdot \frac{10^6\thinspace\mathrm{mm^2}}{1\thinspace\cancel{\mathrm{m^2}}} = 3\times 10^{8}\thinspace\mathrm{mm^2} \\ \\
+72\thinspace\mathrm{km/h} &\longrightarrow \mathrm{m/s} \\
+72\thinspace\frac{\cancel{\mathrm{km}}}{\cancel{\mathrm{h}}} &\cdot \frac{10^3\thinspace\mathrm{m}}{1\thinspace\cancel{\mathrm{km}}} \cdot \frac{1\thinspace\cancel{\mathrm{h}}}{3600\thinspace\mathrm{s}} = 20\thinspace\mathrm{m/s} \\ \\
+24\thinspace\mathrm{g/cm^3} &\longrightarrow \mathrm{\mu g/\mu L} \\
+24\thinspace\frac{\cancel{\mathrm g}}{\cancel{\mathrm{cm^3}}} &\cdot \frac{10^6\thinspace\mathrm{\mu g}}{1\thinspace\cancel{\mathrm{g}}} \cdot \frac{10^3\thinspace\cancel{\mathrm{cm^3}}}{1\thinspace\cancel{\mathrm{dm^3}}} \cdot \frac{1\thinspace\cancel{\mathrm{dm^3}}}{1\thinspace\cancel{\mathrm{L}}} \cdot \frac{1\thinspace\cancel{\mathrm{L}}}{10^6\thinspace\mathrm{\mu L}} = 2.4 \times 10^4\thinspace\mathrm{\mu g/\mu L} \\ \\
+5\thinspace\mathrm{L/s} &\longrightarrow \mathrm{m^3/h} \\
 5\thinspace\frac{\cancel{\mathrm L}}{\cancel{\mathrm s}} &\cdot \frac{1\thinspace\mathrm m^3}{10^3\thinspace\cancel{\mathrm L}} \cdot \frac{3600\thinspace\cancel{\mathrm s}}{1\thinspace\mathrm h} = 18\thinspace\mathrm{m^3/h}
-\end{align*}
+\end{aligned}
+$$
 {{% /callout %}}
 
 ## Laboratorio escolar
diff --git a/content/es/slides/actividad-cientifica-2ESO-3ESO/index.md b/content/es/slides/actividad-cientifica-2ESO-3ESO/index.md
index 7b21f55b8..20dc82ee0 100644
--- a/content/es/slides/actividad-cientifica-2ESO-3ESO/index.md
+++ b/content/es/slides/actividad-cientifica-2ESO-3ESO/index.md
@@ -176,24 +176,29 @@ donde $1 \leq a<10$ y $b$ puede ser cualquier número entero (positivo o negativ
 ---
 
 #### Ejemplos
-\begin{align*}
-	500 &\rightarrow 5\times 10^2 \\\\
-	520 &\rightarrow 5.2\times 10^2 \\\\
-	600000 &\rightarrow 6\times 10^5 \\\\
-	30000000 &\rightarrow 3\times 10^7 \\\\
-	500 000 000 000 000 &\rightarrow 5\times 10^{14} \\\\
+$$
+\begin{aligned}
+	500 &\rightarrow 5\times 10^2 \\
+	520 &\rightarrow 5.2\times 10^2 \\
+	600000 &\rightarrow 6\times 10^5 \\
+	30000000 &\rightarrow 3\times 10^7 \\
+	500 000 000 000 000 &\rightarrow 5\times 10^{14} \\
 	7 000 000 000 000 000 000 000 000 &\rightarrow 7\times 10^{24}
-\end{align*}
+\end{aligned}
+$$
 
 ---
-\begin{align*}
-	0.05 &\rightarrow 5\times 10^{-2} \\\\
-	0.052 &\rightarrow 5.2\times 10^{-2} \\\\
-	0.0004 &\rightarrow 4\times 10^{-4} \\\\
-	0.000 000 01 &\rightarrow 1\times 10^{-8} \\\\
-	0.000 000 000 000 000 6 &\rightarrow 6\times 10^{-16} \\\\
+
+$$
+\begin{aligned}
+	0.05 &\rightarrow 5\times 10^{-2} \\
+	0.052 &\rightarrow 5.2\times 10^{-2} \\
+	0.0004 &\rightarrow 4\times 10^{-4} \\
+	0.000 000 01 &\rightarrow 1\times 10^{-8} \\
+	0.000 000 000 000 000 6 &\rightarrow 6\times 10^{-16} \\
 	0.000 000 000 000 000 000 000 000 8 &\rightarrow 8\times 10^{-25}
-\end{align*}
+\end{aligned}
+$$
 
 ---