Watch Video on Multiplying Decimals - Pre Algebra Help
Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/multiplyingdecimals.php Students learn to multiply decimals in the same way that one would multiply whole numbers (vertically). However, at the end of the problem, students must determine where the decimal goes in the answer by counting the total number of digits to the right of the decimal point in the original numbers, then placing the decimal point in the answer so that the answer has this same total number of digits to the right of the decimal point. For example, after multiplying 1.05 x 7.4, since there are a total of 3 digits to the right of the decimal point in the original numbers, place the decimal point in the answer so that there are 3 digits to the right of the decimal point.
Duration : 0:2:12
[youtube d54VBC02wgs]
Tags: by, decimal, decimals, multiplication, Multiply, multiplying
June 30th, 2009 at 9:26 pm
Thank-you!! I go to …
Thank-you!! I go to Northstar for everything. If he doesn’t have what I am looking for, I go to you!! Keep up the good work!
- etb1997
June 30th, 2009 at 9:26 pm
now do it using …
now do it using tiles riking grade 7 new curriculum
June 30th, 2009 at 9:26 pm
sorry that was …
sorry that was wrong of me. =]
June 30th, 2009 at 9:26 pm
This lady talks …
This lady talks like a baby! Ugh It bugs me.
June 30th, 2009 at 9:26 pm
very clear. also i …
very clear. also i love this persons delivery.
June 30th, 2009 at 9:26 pm
Thanks so much!
Thanks so much!
June 30th, 2009 at 9:26 pm
This is exactly …
This is exactly what I need! Oh Thankyou thankyou thankyou!
June 30th, 2009 at 9:26 pm
i can use this to …
i can use this to explain decimals better in my class
June 30th, 2009 at 9:26 pm
now i can do my …
now i can do my homework in peace of mind.
June 30th, 2009 at 9:26 pm
If students follows …
If students follows your lead,they wouldn’t get a true understanding of decimal placement. While it works in the above equation, it wouldn’t be correct if the decimal had to be moved more than two places. Let’s say the decimal in the multiplicand is between the 1 and 6 (1.61)keeping the mutiplier as is. From your instructions, the product would read 386.4 which is incorrect. Students must start counting from the one’s column and final decimal is placed to the left of the digit, that is (3.864).
June 30th, 2009 at 9:26 pm
thanks for speaking …
thanks for speaking clearly it helps aLOT more
June 30th, 2009 at 9:26 pm
Thanks!
Thanks!