A lot of struggling math students have found comfort in the mathematical stylings of Salman Khan. A few years back, Khan started creating videos to help tutor his cousin in math. Those videos became ...

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Multiply by 5 using the grouping of objects, counting by fives, and arrays. Explore the Multiply by 5 facts using the grouping of objects, counting by fives, and arrays. Compete against characters to ...

After duplex numbers, let us learn multiplication by triplex numbers. As the name suggests, numbers like 111, 222, 333 are triplex numbers. The method is similar to that of multiplication by duplex ...