Converting Decimals Into Fractions

We are converting decimals into fractions. Basically you just have to find a common factor and divide or multiply. For example, if you are converting 12/25 you find  the common factor which is 4  and multiply by 4 so 25 x 4 equals 100 and 12 x 4 equals 48 so it would be 48/100

Math at School

We have been working on stuff in math, a examples is percentage of quantity. to do percentage of quantity you have to take a certain percent out of a number. an example is 25 out of 100 would be 25%.

 have you ever done percentage of quantity before ?

Converting Fractions to Hundredths

We learned how to convert Fractions to Hundredths. For example, 7/25, first you see how many times 25 goes into 100, four times so you would multiply the 7 by as many times 25 goes into 100 so 7x4=28 so 28/100 or .28.

CAN YOU CONVERT 18/20?

Increase and Decrease

  I learned how to decrease and increase by percentages   The way that you decrease is the same as increase with one extra step, subtracting. 

• The first step is subtracting the numbers.  For example, 60 - 18 = 42.  
• Than after that you divide 42 by the original number 60 divided by 42.  
• Since this is impossible we add a zero 420 divided by 60 = 70. That is increase. 
• To decrease you do 100 - 70 = 30 that is decrease.  This answer stopped early but you usually need to add zeros for a little longer.

 

Expanded Form

Expanded form is the expanded form of a number. For example, if we use the number 12,963 the expanded form would be 10000 +2000+900+60+3=12963. so you basically have to list all of the place values one by one.

What We Learn in Math

We learned how to right in Word Form. For example, lets say you have a number like this 395,781.274 in word form it would be three hundred ninety five thousand, seven hundred eighty one and two hundred seventy four thousandths. It would be thousandths not thousand because 274 the 2 is tenths the 7 is hundredths and the 4 is the thousandths.

                  If you don’t understand leave a comment.

Powers of 10

MATH POWERS OF 10

In math we are learning about powers of 10 it was really hard at first but then ms. A helped us. First we were using multiplication so you would bring the decimal to the RIGHT as much times as the zero like this.

                          Then we did division you would bring              decimal to the LEFT as much times as the zeros.

Have you ever learned powers of 10 if you have please comment.

Writing And Reading Decimals

We are learning about reading and writing decimals.There is expanded notation and word form.  Expanded notation is when breaking down the number into thousands, hundreds, tens, ones etc. like this 40,000+3,000+200+50+1 okay that number was 43,251 that is expanded form. Word form is when you write the number in words like the number before 43,251 I'll write it in words: forty three thousand two hundred fifty one.

"WRITE ME BACK FOR MORE INFO!" 
CAN YOU DO THIS NUMBER IN EXPANDED FORM: 5,343,876,694,453

Powers of 10

We have been working on powers or ten.  It has been a little hard with some people but most of us got it.

Basically you have to move the decimal to the right or left depending on if you are multiplying or dividing.  If you are dividing you move the decimal to the left.  If you are multiplying you move the decimal to the right.  For example, If you are multiplying .23 by 1000 you move the decimal three times to the right because there are three zeros in one thousand and you are multiplying.

Have you ever done powers of ten?

What 5th Graders are Doing in Math

The 5th graders are working on decimals. For example, we learned that when we are multiplying decimals your answer gets bigger,and when you are dividing decimals your answer gets smaller. Every zero in the number you have to move the decimals over how ever many numbers there are zeros. For example, when you are multiplying 4.04 x 100 since there are two zeros in 100 you move the decimals over to the right two times, so your answer will be 404. , and when you are dividing your answer will get smaller. For example, 88 divided by 1,000 since you are dividing and there are three zeros you move the decimal over to the left  three times your answer will be .088.  And that is how you multiply and divide decimals.

***Now do you know how to multiply and divide decimals? If so what is 908 divided by 100.***