Khan Academy Wiki

The Visually understanding multiplying fractions and whole numbers exercise appears under the 5th grade (U.S.) Math Mission. This exercise uses various visual models to help understand the idea of multiplication between fractions and whole numbers.

Types of Problems[]

There are four types of problems in this exercise:

  1. Write the pictured multiplication problem: This problem has a array model that pictures a multiplication problem. The user is expected to write the multiplication problem in the picture.
    Vumfawn1

    Write the pictured multiplication problem

  2. Find the value of the product with the model: This problem uses multiple copies of whole boxes to represent a multiplication problem. Users are asked to find the product and write it in the space provided.
    Vumfawn2

    Find the value of the product with the model

  3. Find the value of the pictured product: This problem uses an array model again, but this time the user is asked to evaluate the product and write the final answer in the space provided.
    Vumfawn3

    Find the value of the pictured product

  4. Move the dot on the number line: This problem provides a multiplication problem and a number line. The users asked to move the orange dot to the answer of the associated multiplication problem.
    Vumfawn4

    Move the dot on the number line

Strategies[]

Knowledge of fraction multiplications is sufficient to ensure accuracy and efficiency on this exercise.

  1. Users should type the "*" symbol to represent multiplication.
  2. Do not give the answer on Write the pictured multiplication problem, write it as a product.

Real-life Applications[]

  1. Fractions and their connection with ratios and proportions provide many diverse applications in many fields.
  2. Fractions are used in real life in many different ways, but they are most commonly used in the cooking, construction and science industries.