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---
title: 'Comprueba tus habilidades: Matematicas.'
slug: 'Learn/JavaScript/First_steps/Test_your_skills:_Math'
tags:
- JavaScript
- Matemática
- Principiante
- Prueba tus habilidades
- aprende
translation_of: 'Learn/JavaScript/First_steps/Test_your_skills:_Math'
---
<div>{{learnsidebar}}</div>
<p>El objetivo de esta prueba de habilidad es conocer si has entendido nuestra clase sobre el articulo <a href="/en-US/docs/Learn/JavaScript/First_steps/Math">Matematica basica en JavaScript — números y operadores</a>.</p>
<div class="blockIndicator note">
<p><strong>Nota</strong>: Puedes probar soluciones en los editores interactivos a continuación, sin embargo, puede ser útil descargar el código y usar una herramienta en línea como <a href="https://codepen.io/">CodePen</a>, <a href="https://jsfiddle.net/">jsFiddle</a>, o <a href="https://glitch.com/">Glitch</a> para trabajar en las tareas.</p>
<p>Si se queda atascado, pídanos ayuda; consulte la sección {{anch ("Evaluación o ayuda adicional")}} en la parte inferior de esta página.</p>
<p><strong>Nota</strong>: En los ejemplos a continuación, si hay un error en su código, se mostrará en el panel de resultados de la página, para ayudarlo a tratar de averiguar la respuesta (o en la consola JavaScript del navegador, en el caso de la versión descargable).</p>
</div>
<h2 id="Math_1">Math 1</h2>
<p>Iniciemos poniendo a prueba sus conocimientos acerca de los operadores matemáticos básicos. Usted tendrá que crear 4 valores númericos, unir los 2 primeros, hacer una resta del cuarto con el tercero y multiplicar los resultados secundarios juntos para obtener un resultado final de 48. Y finalmente, necesita ejecutar una prueba para comprobar si el resultado es un numero par.</p>
<p>Asi que intente realizar la actualización del código descrito abajo para crear el ejemplo terminado, siguendo estos pasos:</p>
<ol>
<li>Crea cuatro variables que contengan numeros. Llama a las variables razonablemente.</li>
<li>Agrega las dos primeras variables juntas y guarda el resultado en otra variable.</li>
<li>Subtract the fourth variable from the third and store the result in another variable.</li>
<li>Multiply the results from the last two steps together, storing the result in a variable called <code>finalResult</code>. The product should be 48. If it isn't, you'll have to adjust some of the initial input values.</li>
<li>Finally, write a calculation that checks whether <code>finalResult</code> is an even number. Store the result in a variable called <code>evenOddResult</code>.</li>
</ol>
<p>{{EmbedGHLiveSample("learning-area/javascript/introduction-to-js-1/tasks/math/math1.html", '100%', 400)}}</p>
<div class="blockIndicator note">
<p><a href="https://github.com/mdn/learning-area/blob/master/javascript/introduction-to-js-1/tasks/math/math1-download.html">Download the starting point for this task</a> to work in your own editor or in an online editor.</p>
</div>
<h2 id="Math_2">Math 2</h2>
<p>In the second task you are already provided with two calculations, with the results stored in the variables <code>result</code> and <code>result2</code>. But these results aren't what we want; you'll need to take the calculations and change them to give us what we want.</p>
<p>What do we want? After multiplying the two results together and formatting the result to 2 decimal places, the final result should be 10.42.</p>
<p>Try updating the live code below to recreate the finished example, following these steps:</p>
<ol>
<li>Write a calculation that multiples <code>result</code> and <code>result2</code> together and assigns the result back to <code>result</code>. This will require assignment shorthand.</li>
<li>Write a line of code that takes result and formats it to 2 decimal places, storing the result of this in a variable called <code>finalResult</code>.</li>
<li>Check the data type of <code>finalResult</code> using <code>typeof</code>; you'll probably see that it is actually of <code>string</code> type! Write a line of code that converts it to a <code>number</code> type, storing the result in a variable called <code>finalNumber</code>.</li>
<li>The value of <code>finalNumber</code> needs to be <code>10.42</code>. Go back and update the original calculations you were provided with so that they give this final result. Don't update the numbers or the operators.</li>
</ol>
<p>{{EmbedGHLiveSample("learning-area/javascript/introduction-to-js-1/tasks/math/math2.html", '100%', 400)}}</p>
<div class="blockIndicator note">
<p><a href="https://github.com/mdn/learning-area/blob/master/javascript/introduction-to-js-1/tasks/math/math2-download.html">Download the starting point for this task</a> to work in your own editor or in an online editor.</p>
</div>
<h2 id="Math_3">Math 3</h2>
<p>In the final task for this article, we want you to write some tests. You've got three groups, each consisting of a statement and two variables. For each one, write a test that proves or disproves the statement made. Store the results of those tests in variables called <code>weightComparison</code>, <code>heightComparison</code>, and <code>pwdMatch</code>, respectively.</p>
<p>{{EmbedGHLiveSample("learning-area/javascript/introduction-to-js-1/tasks/math/math3.html", '100%', 400)}}</p>
<div class="blockIndicator note">
<p><a href="https://github.com/mdn/learning-area/blob/master/javascript/introduction-to-js-1/tasks/math/math3-download.html">Download the starting point for this task</a> to work in your own editor or in an online editor.</p>
</div>
<h2 id="Assessment_or_further_help">Assessment or further help</h2>
<p>You can practice these examples in the Interactive Editors above.</p>
<p>If you would like your work assessed, or are stuck and want to ask for help:</p>
<ol>
<li>Put your work into an online shareable editor such as <a href="https://codepen.io/">CodePen</a>, <a href="https://jsfiddle.net/">jsFiddle</a>, or <a href="https://glitch.com/">Glitch</a>. You can write the code yourself, or use the starting point files linked to in the above sections.</li>
<li>Write a post asking for assessment and/or help at the <a href="https://discourse.mozilla.org/c/mdn/learn">MDN Discourse forum Learning category</a>. Your post should include:
<ul>
<li>A descriptive title such as "Assessment wanted for Math 1 skill test".</li>
<li>Details of what you have already tried, and what you would like us to do, e.g. if you are stuck and need help, or want an assessment.</li>
<li>A link to the example you want assessed or need help with, in an online shareable editor (as mentioned in step 1 above). This is a good practice to get into — it's very hard to help someone with a coding problem if you can't see their code.</li>
<li>A link to the actual task or assessment page, so we can find the question you want help with.</li>
</ul>
</li>
</ol>
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