5.NBT.2. Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use wholenumber exponents to denote powers of 10.
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Ages: 9  13
1384 Views:

This narrated animated video begins by reviewing what a product is, that multiplication is repeated addition, and powers of 10 and place value. The core lesson first presents the problem 512 x 46, as the instructor explains how to solve the problem a...s graphics are displayed. Then, another problem is presented and worked through, following the proper steps of multiplying. (4:35)
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October 19, 2012 at 01:04 AM


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Ages: 10  16
3757 Views:

Students learn that in the metric system, all measures of length are based on meters. For example, a centimeter is 1/100 of a meter. And all measures of weight are based on grams. For example, a kilogram is 1000 grams. And all measures of volume are ...based on liters. For example, a milliliter is 1/1000 of a liter. Students are then asked to solve problems using conversion factors, such as 4,500 milligrams = ____ grams. (01:26)
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August 21, 2009 at 12:00 PM


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Ages: 9  14
4511 Views:

What is the value of the 3 in 654.213?
Mr. Khan, the instructor, uses computer software in this fourminute video for his demonstration. Although he uses different colors for emphasis, the screen is a little 'busy' so the viewer may want to open th...e screen to 'full screen' to see all the information more clearly.
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August 18, 2010 at 09:38 PM


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Ages: 9  13
335 Views:

The instructor (who is dressed like a pig) demonstrates how to multiply whole numbers by different powers of 10. He explains that the exponent denotes how many zeros to add to the product when multiplying. He provides a pig fact at the end of the vid...eo that leads to a math problem, asking how to write a number using powers of 10.
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October 14, 2012 at 11:35 PM


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Ages: 5  10
4141 Views:

Chip Abacus
From usu.edu, produced by Utah State University


With this manipulative, you can represent place value and exchanges in base 2, base 5, or base 10. Set the desired base with the up and down arrow buttons below the workspace. Chips in columns then represent units (1), bases (2, 5, or 10), and bases...quared (4, 25, or 100), as indicated by the numbers at the top of each column.
Note that chips can be dragged within a column but not from one column to another.
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May 9, 2010 at 10:40 AM


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Ages: 10  15
1398 Views:

The instructor provides three problems: (1) .0005 x 10 (2) 2.1005 x 100 (3) 8.9 x 1000. He explains there is only one rule when multiplying decimals by powers of 10: to shift the decimal to the right, and the amount of shift equals the number of zer...os in 10 or power. He uses an interactive white board to work the problems.
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October 14, 2012 at 11:49 PM


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Ages: 10  14
666 Views:

The instructor uses an interactive white board to show that multiplying a decimal by 10, 100, 1,000, or 10,000 moves the decimal one, two, three, or four places to the right. He displays a calculator to show this as well. He also explains and shows t...hat dividing by a power of 10 moves the decimal place to the left according to the number of zeros in the number you are multiplying by. (6:10)
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October 15, 2012 at 12:15 AM


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Ages: 9  14
327 Views:

The instructor uses a word problem to demonstrate how to multiply a decimal by powers of 10. The word problem provides the cost of a stamp and asks how much a roll of 1000 stamps would cost. He shows how to move the decimal if multiplying by 10, 100,... and finally 1000, arriving at the solution to the word problem.
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October 14, 2012 at 10:46 PM


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Ages: 9  13
243 Views:

This video demonstrates what it means to multiply a single digit number by a power of ten. For example, 4 x 10, 5 x 100 or 3 x 1000. This video can be used to build understanding of place value and would be a good precursor to expanded notation.
October 14, 2012 at 10:35 PM


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Ages: 10  14
229 Views:

The instructor explains how to divide a decimal by power of 10. The problem he works through is: 99.061 / 100. He first shows how to divide the number by 10, and he relates how to move the decimal to the left when dividing. (3:18)
October 15, 2012 at 11:15 PM
