Fandom

Khan Academy Wiki

Equivalent fractions

1,860pages on
this wiki
Add New Page
Talk0 Share
Equivalent fractions
Equivalent fractions 256
Description
Exercise Name: Equivalent fractions
Math Missions: 4th grade (U.S.) Math Mission, Arithmetic essentials Math Mission, Pre-algebra Math Mission, Mathematics I Math Mission
Types of Problems: 1

The Equivalent fractions exercise appears under the 4th grade (U.S.) Math Mission, Arithmetic essentials Math Mission, Pre-algebra Math Mission and Mathematics I Math Mission. This exercise introduces different forms of the same fraction by manipulating denominators and numerators. It can also be viewed as an introduction to cross multiplication.

Types of Problems

There is one type of problem in this exercise:

  1. Find the number: This problem provides a proportion, i.e., a statement that two ratios are equal. One number is missing and the student is asked to find the missing number.
    Equivfrac

    Find the number

Strategies

This exercise is easy to get accuracy badges and speed badges because there is only one type of problem, the numbers are manageable, and the techniques are well known.

  1. It is fastest to quickly determine what the multiplier is from either the numerators or the denominators (whichever is given) and then just use that to complete the fraction. Cross multiplication techniques take longer than this since the number used are all integers, and usually small multipliers.

Real-life Applications

  1. Fractions appear in every-day media to display information to consumers.
  2. Fractions, decimals, and percents are used in many sports such as basketball to determine how many field goals the player has made over how many they attempted.
  3. Fractions are used in real life in lots of different ways, but are commonly used in cooking, construction and science.

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.