JSFiddle - React, Tailwind, and code Playground

HTML

<div class="centrerlesenfants">
    <input type="text"  value="Vitesse moyenne" class="cacherA" id="vites"> 
		<input type="text" id="vite" class="cacherA"><br>
    <img src="image/calcul2.png" id="calcul2" onclick="RHCst()"  title="Calculer">
		<img src="image/calcul3.png" id="calcul3" onclick="RHat()" class="cacher"   title="Calculer">
</div>

CSS

.centrerlesenfants {
  text-align:center;
}