BÀI 19 : FIND PERCENTAGES OF NUMBERS- TÌM TỶ LỆ % CỦA SỐ

XEM VIDEO TẠI ĐÂY https://www.youtube.com/watch?v=uRimkk9tsXI What is 10% of a million dollars. exactamente 10% is $100,000 . go gogo …  To find 10% of a million dollars, we simply move the decimal point one place to the left. If  we had 10 stacks of cash on a table and each stack was $100,000 ,we would have a million dollars.  one stack equals one tenth  which is $100,000. 10 / 10 would be all 10 stacks equals $1,000,000. wrote…… chut cha chut cha-ching...

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BÀI 18 : DIVIDING DECIMALS.

XEM VIDEO TẠI ĐÂY https://www.youtube.com/watch?v=brzZNmByyM4 Alright guys . Now  let's look at dividing decimals . Ooh  sounds scary but it's really not okay.  So  we have two point four five divided by one point five . And the first thing you want to do is take that second number or the divisor and make it an integer . So  to do that we want to move the decimal.  One  place to the right or multiply by ten it's another way of thinking about it. But  ultimately we just want to make one point five...

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BÀI 17 : MULTIPLYING DECIMALS.

XEM VIDEO TẠI ĐÂY https://www.youtube.com/watch?v=zEHbLRHxQpE The following is a selected video from yourteacher.com  where you can browse over 450 complete math lessons with example videos interactive practice problems self tests and more try a complete lesson today at yourteacher.com To multiply decimals . Sixteen  point one times two point four. First  line up the numbers . Then  multiplies though we were multiplying whole numbers . So  we can think of this problem . As  161 times 24. Now multiplying...

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BÀI 16 : SUBTRACTION OF DECIMALS

XEM VIDEO TẠI ĐÂY https://www.youtube.com/watch?v=XTqsWWRC_4k Oh Subtract.  Let 's find 1 point 6 minus 0.4. Start  by subtracting the 10th.  6 tenths minus 4 tenths equals 2 tenths.  Remember to write the decimal point.  Now  subtract the ones won 1-0 ones equals 1 1.  So  1. point 6 minus 0.4 equals 1 point 2. Subtract  find 4.85 minus 3.2 5 . Subtract the hundredths five hundredths minus five hundredths equals zero hundredths. subtract the tenths.  Eight  tenths minus two...

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BÀI 15 : ADDITION OF DECIMALS

XEM VIDEO TẠI ĐÂY https://www.youtube.com/watch?v=nHwMn7kAYiE&index=14&list=PLYVhl_y4T2iRMYH3o9xmfflM_deCb1wyq Now, this lets me take a look at addition of decimals. Now , I've drawn a pup there a puppy dog. BUP because in addition of decimals ,we keep the point under point okay . PU P point under point. Very Important.  Let 's look at some examples. First  one four point five plus six point nine . Now , it's very important that you write this out on pen and paper...

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BÀI 14: DECIMALS: SỐ THẬP PHÂN

XEM VIDEO TẠI ĐÂY https://www.youtube.com/watch?v=e1bWoNpxsKE Welcome to decimals . We 're used to seeing numbers like this.  But  what about this. This  dot here shows us that this number is not 24.  This  is our whole number or our unit.  We  have two units . This  is called a decimal point . And  this is how many tenths we have.  Tenths  are a part of a whole number . Numbers  after the decimal are similar to a fraction They...

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BÀI 19: ANGLES - ACUTE, OBTUSE, RIGHT, STRAIGHT

XEM VIDEO TẠI ĐÂY https://www.youtube.com/watch?v=vM6zued_V5Q Angles . Angles  are all around us. Angles are formed when two lines meet . If  there are two straight lines such that they have a common endpoint. Then  the amount of turn (curl) between these two lines is known as angle between those lines. There are angles in most shapes and in many of the objects you see and use on a daily basis . Angles  are measured in degrees. There  are four types of angles:...

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