ed tech powerpoint multiplying by 10
DESCRIPTION
Tech LessonTRANSCRIPT
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MultiplicationMultiplying by 10 and 11
http://math.pppst.com/banner_math_multiplication.gif
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Multiplying by 10
Multiplying by 10 is EASY! All you do is add a zero on the
end!
http://www.pv.noacsc.org/Portals/0/H.%20Bockrath/math%20clip%20art.gif
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http://www.youtube.com/watch?v=jPO5zAwfRSc
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0
10
20
30
40
50
60
70
80
90
1000 10 20 30 40 50 60 70 80 90
Do you see the pattern?
http://www.jeremynoeljohnson.com/jimages/blogposts/blanktimestable01.png
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Now you try it…
10 x 4 = ?4010 x 7 =?70
10 x 9 = ?9010 x 6 = ?60
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Multiplying by 11
Numbers less than 9—All you do is double the digit to get the product.
So… 11 x 5 = 5511 x 7 = 77What does 11 x 8 = ?88 http://
sekolahcikal.files.wordpress.com/2009/12/funmath.jpg
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What’s the pattern here?
11
22
33
44
55
66
77
88
99
http://www.jeremynoeljohnson.com/jimages/blogposts/blanktimestable01.png
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What do you do for numbers greater than 9?
http://www.youtube.com/watch?v=QMPDLQ71PI8
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Multiplying Numbers Greater Than 9
11 x 26 = ?If you take 2+6 you get 8.Put the 8 between the 2 and the 6 to
get your answer.11 x 26 = 286
http://www.cfsnc.org/uploaded/News_and_Events/images/Lower_School/math_clip_art_01.jpg
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Now you try it…
11 x 23 = ?
25311 x 32 = ?352
11 x 18 = ?19811 x 12 = ?132
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Mixed Review
11 x 35 = ?38510 x 9 = ?9010 x 4 = ?40
11 x 5 = ?5510 x 2 = ?2011 x 8 = ?88
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Works Cited
Handley, B. "Speed Math for Kids: The Fast, Fun Way to Do Basic Calculations." ERIC: Reports. U.S. Department of Education, 2007. Educators Reference Complete. Web. 11 Oct. 2011.
Pierce, R. (18 Feb 2011). "Multiplication - Times Tables." Retrieved from http://www.mathsisfun.com/tables.html
Rak Productions. (September, 1999). Multiplication Song (multiply by 10). Retrieved from http://www.youtube.com/watch?v=jPO5zAwfRSc
Rak Productions. (September, 1999). 11 Times Trick (for numbers greater than 9)-Multiplication Math Song. Retrieved from http://www.youtube.com/watch?v=QMPDLQ71PI8
Su, Francis E. (1999) Multiplication by 11. Retrieved from http://www.math.hmc.edu/funfacts