Instructional Video3:36
Curated Video

Substitution Property - How To Solve 3m = n - 7

9th - Higher Ed
Welcome to Math Defined with Mrs. C. - Math Confidence-Boosting Math Practice - Substitution Property - How To Solve 3m = n - 7 with Set Values of n={-2, 1, 4} In this video, I will show you how to solve the equation 3m = n - 7, to...
Instructional Video8:05
Curated Video

Can You Solve The Hardest Easy Geometry Problem?

6th - 11th
In the figure, what is the value of angle x? This problem is known as Langley's Adventitious Angles. It is also known as the hardest easy geometry problem because it can be solved by elementary methods but it is notoriously difficult to...
Instructional Video15:56
Curated Video

HARD Geometry Problem: Can You Solve The Horse Grazing Puzzle?

6th - 11th
A horse is tied to an outside corner of a 20 foot by 10 foot rectangular barn. What is the maximum area the horse can graze outside, if the rope has length L? Solve for L = 5 and L = 25 (find exact answers). If you are up for a...
Instructional Video15:46
Kids Academy

Compare Numbers - Greater Than Less Than | Math for 1st Grade | Kids Academy

Pre-K - 4th
Kids Academy Summer Camp is here! For each grade, we have prepared a 2 months’ worth of learning, built with hand-crafted lessons and fun activities. Start learning now with 50% OFF! https://bit.ly/3ecoNf9 Children working on primary...
Instructional Video6:54
Curated Video

Can You Solve Amazon's Hanging Cable Interview Question?

6th - 11th
A cable of 80 meters (m) is hanging from the top of two poles that are both 50 m from the ground. What is the distance between the two poles, to one decimal place, if the center of the cable is (a) 20 m above ground? (b) 10 m above...
Instructional Video3:57
Kids Academy

Comparing 2-digit numbers - Comparing Numbers for 1st grade | Math | Kids Academy

Pre-K - 4th
Comparing 2-digit numbers - Comparing Numbers for 1st grade | Math | Kids Academy Install now Kids Academy Talented & Gifted: https://smart.link/5d9b5460c7805 When comparing numbers, learners will examine and then assess whether a given...
Instructional Video4:07
Curated Video

Math Magic Card Trick - Rolling 3 Dice

6th - 11th
Have a spectator roll 3 dice. Count out cards equal to the sum of the dice. Then remove the middle value dice. From the smaller deck, count out cards equal to the sum of the remaining two dice and place the rest of the deck on top. Do...
Instructional Video7:35
Curated Video

Only A "Genius" Can Solve - Each Letter Is A Number

6th - 11th
What value is each letter? This is an incredible math problem with just a single solution! Can you figure it out? My blog post for this video https://wp.me/p6aMk-85e Websites consulted http://mathforum.org/library/drmath/view/60417.html...
Instructional Video5:39
Curated Video

Can You Solve Homework For 10 Year Olds In China?

6th - 11th
Thanks to Eric from Miami for suggesting this problem and sending a solution! The diagram shows a quadrilateral ABCD with the values for some angles and the length of AB. Can you figure out the area of ABCD? Subscribe:...
Instructional Video13:04
Khan Academy

Singapore Math: Grade 3a, Unit 2 (Part 4)

3rd
Use the Singapore math methods to work through simple problems. Visual representations of word problems allow viewers to start making predictions and estimating the answers. This is a good way for class members to use various methods to...