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Add exercise -- simpler equivalent fractions that approaches problem …

…visually
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commit ca5924d1d017b0bd35abaee2d1a56e92a616d3c6 1 parent a088aa0
@marcia marcia authored
Showing with 81 additions and 3 deletions.
  1. +80 −0 exercises/equivalent_fractions_1.html
  2. +1 −3 utils/word-problems.js
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80 exercises/equivalent_fractions_1.html
@@ -0,0 +1,80 @@
+<!DOCTYPE html>
+<html data-require="math graph word-problems">
+<head>
+ <title>Equivalent Fractions 1</title>
+ <script src="../khan-exercise.js"></script>
+</head>
+<body>
+ <div class="exercise">
+ <div class="vars" data-ensure="A < B">
+ <var id="A">randRange( 1, 3 )</var>
+ <var id="B">randRange( 2, 4 )</var>
+ <var id="M">randRange(2, 3)</var>
+ <var id="C">A * M</var>
+ <var id="D">B * M</var>
+ </div>
+
+ <div class="problems">
+ <div>
+ <div class="question">
+ <p><code>\dfrac{<var>A</var>}{<var>B</var>} = \dfrac{?}{<var>D</var>}</code></p>
+ </div>
+ <div class="solution"><var>C</var></div>
+ <div class="hints">
+ <div>
+ <p>The fraction on the left represents <var>A</var> out of <var>B</var> slices of a rectangular <var>pizza( 1 )</var>.</p>
+ <div class="graph" style="width: 200px; height: 50px;">
+ rectchart( [A, B - A], ["#ee0000", "#999"] );
+ </div>
+ </div>
+ <div>
+ <p>What if we cut the <var>pizza( 1 )</var> into <var>D</var> slices instead? How many slices would result in the same amount of <var>pizza( 1 )</var>?</p>
+ <div class="graph" style="width: 200px; height: 50px;">
+ rectchart( [D], ["#999"] );
+ </div>
+ </div>
+ <div>
+ <p>We would need <var>C</var> slices.</p>
+ <div class="graph" style="width: 200px; height: 50px;">
+ rectchart( [C, D - C], ["#ee0000", "#999"] );
+ </div>
+ </div>
+ <p><code>\dfrac{<var>A</var>}{<var>B</var>} = \dfrac{<var>C</var>}{<var>D</var>}</code> and so the answer is <code><var>C</var></code>.</p>
+
+ </div>
+ </div>
+
+ <div id="yo">
+ <div class="question">
+ <p><code>\dfrac{<var>A</var>}{<var>B</var>} = \dfrac{<var>C</var>}{?}</code></p>
+ </div>
+ <div class="solution"><var>D</var></div>
+ <div class="hints">
+ <div>
+ <p>The fraction on the left represents <var>A</var> out of <var>B</var> slices of a rectangular <var>pizza( 1 )</var>.</p>
+ <div class="graph" style="width: 200px; height: 50px;">
+ rectchart( [A, B - A], ["#ee0000", "#999"] );
+ </div>
+ </div>
+
+ <div>
+ <p>How many total slices would we need if want the same amount of <var>pizza( 1 )</var> in <var>C</var> slices? </p>
+ <div class="graph" style="width: 200px; height: 50px;">
+ rectchart( [C, D - C], ["#ee0000", "#fff"] );
+ </div>
+ </div>
+
+ <div>
+ <p>We would need to cut the <var>pizza( 1 )</var> into <var>D</var> slices.</p>
+ <div class="graph" style="width: 200px; height: 50px;">
+ rectchart( [C, D - C], ["#ee0000", "#999"] );
+ </div>
+ </div>
+
+ <p><code>\dfrac{<var>A</var>}{<var>B</var>} = \dfrac{<var>C</var>}{<var>D</var>}</code> and so the answer is <code><var>D</var></code>.</p>
+ </div>
+ </div>
+ </div>
+ </div>
+</body>
+</html>
View
4 utils/word-problems.js
@@ -218,9 +218,7 @@ jQuery.fn[ "word-problemsLoad" ] = function() {
var pizzas = KhanUtil.shuffle([
"pizza",
"pie",
- "cake",
- "orange",
- "lemon"
+ "cake"
]);
jQuery.extend( KhanUtil, {
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