Have you ever been in the store, and something was on sale but you cannot figure out how much the price is marked down. Well today in class I learned a very easy method for this. You start out by multiplying the number by 10%. For example, say there is a shirt at the mall and it is $20 and it is 10% off. You would move the decimal place over one spot to the left leaving you with $2 making the shirt $18. Now say the $20 shirt is 30% off. You would still start by moving the decimal one place to the left leaving you with $2 then you would multiply it by 3, giving a total of $6 off the shirt; making the shirt $14. This will come in handy for many other things besides shopping, but it is an excellent way to teach and learn how to multiply by percents.
There are many other ways you can multiply by a percent, but they are not as easy as this…
Desi, I thought the same thing as we went overt this today. This will help me with many things. Shopping, like you said, as well as tipping your waitress when out to eat. No more getting out my cell phone calculator when the bill comes!!
ReplyDeleteI agree. This will help in many ways. It bugs me when I go into a store and I cant figure out the sale price. No more needing a calculator to figure out the prices.
ReplyDeleteI thought the video you linked to made the math look much worse than it is. To find 20% of 82, take 10% of 82, which is 8.2, and double it: 16.4. Done.
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