A simple, teacher-made video is an explanation of multiplying a 1 digit number by a 2, 3, or 4-digit number. Very well-paced for live instruction (includes encouragement from a costumed child for positive support). (03:12)

A weird way of doing long multiplication...but it's amazing still. Lines are drawn representing the digits in the problem. The number of intersections at particular points gives the answer to the multiplication question. Pen and paper - no narrative.... (01:14)[more]

In this student-created video, a tip for multiplying numbers 11-19 mentally is demonstrated. A student explains the tip on a white board using the example, 15 x 13. (01:14)

Students learn to multiply numbers with one or more digits, such
as 56 x 7. The first step is to line up the numbers vertically so that
the units digits are in the same column. Next, multiply 6 x 7 to get
42, which is the same as 4 tens and 2 ones.... So put a 2 in the units
column and carry a 4 to the tens column. Next, multiply 5 x 7 to get
35, then add the 4 that was carried to the tens column to get 39. So 56 x 7 = 392. Note that the answer to a multiplication problem is called the product, so the product of 56 x 7 is 392. Students also learn to multiply numbers with two or more digits, such as 21 x 43, by creating two rows of products and adding the rows. (01:56)[more]

From discoveryeducation.com, produced by Discovery Education

Students learn how to multiply two two-digit numbers by first learning how to multiply a two-digit number by a tens number and comparing it to multiplying a two-digit number by a one-digit number. (04:23)

The instructor offers his strategies for multiplying multi-digit numbers. Several examples are shown on a white board of the steps involved for of multiplying two-digit by two-digit problems. He shows an examples of solving the problems the traditi...onal way and then solves the same problem using the backwards way. (08:52)[more]

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