Computer Science Unplugged
Divide and Conquer—Santa’s Dirty Socks
The story "Santa's Dirty Socks" provides learners an example of a search algorithm that uses a divide and conquer system similar to a binary search algorithm. The included questions expand upon the concepts that follow the story.
Illustrative Mathematics
How Many Servings of Oatmeal?
Here is another way to illustrate division of a whole number by a unit fraction. In this case, the problem is asking if there are so many servings per cup, how many servings are in a package of multiple cups. Learners are to model their...
Computer Science Unplugged
Lightest and Heaviest—Sorting Algorithms
How do computers sort data lists? Using eight unknown weights and a balance scale, groups determine the order of the weights from lightest to heaviest. A second worksheet provides the groups with other methods to order the weights. The...
Computer Science Unplugged
Tourist Town—Dominating Sets
As an introduction to using a network to determine the fewest number of nodes that meet a given condition, small groups work together to determine the fewest number of ice cream vans, and their locations, to be able to serve the people...
University of Waterloo (Canada)
University of Waterloo: Math Frog: Dividerama!
Play Dividerama to test your skills at division by completing 16 long division questions.
NumberNut
Number Nut: Basic Math: Two Digit Division
This lesson offers strategies for dividing two-digit numbers. Students are introduced to related vocabulary, long and short division, and two-digit division with remainders. Links to the interactive games allow students to practice and...
Math Is Fun
Math Is Fun: Long Division to Decimal Places
If you want to learn the traditional algorithm for long division when you divide to the decimal places, this website gives a very clear, simple step-by-step break down of the process. Students can solve six problems to practice the skill...
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Estimate the Quotient [Pdf]
This activitiy asks students to randomly select a one-digit divisor and a three-digit dividend and estimate the quotient mentally. Students must then explain why they believe their estimate is accurate.
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