Dividing Decimals

C

chrisgritz

New member
Joined
Mar 17, 2015
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Hey guys, math is my worst subject! Currently studying for GED and i could use some help with this problem. When i do it on my own i get the answer 243.14 with a remainder of 3, when i put it in the calculator i get the answer 243.146. Even this website that i am using states the samething but gives me my answer. Here is a screenshot, can anyone tell me where the 6 comes from and why is there not a 3 there instead? Ty!

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the problem is ....

0.5 / 121.573
 
Think about regular long division (where they don't do funky things with remainders after you've gone into decimal places). If you had 13 divided by 5, you'd get 2, with remainder 3. If you converted this to mixed-number form, you'd get 2, plus 3/5 (being the remainder 3, divided by the divisor 5). If you converted this to decimal form, you'd get 2+6/10 = 2.6

In your case, you have 243.14, plus a remainder of 3. The divisor is 5, so the mixed-number form would be 243.14 and 3/5 (of 1/100), or 243.14 and (3/5)(1/100) = 3/500 = 6/1000, or 243.14 and 0.006, which equals 243.146.

The mixed-number form, based on the remainder divided by the divisor, is not the same thing as the decimal form. That's why the values are different. ;)
 
Another easy one for you guys lol

9/0.8 ?

I thought it was 11.5 but it's 11.25, can anyone please show me the steps to this one? I think i am trying too hard.
 
chrisgritz said:
Another easy one for you guys lol

9/0.8 ?

I thought it was 11.5 but it's 11.25, can anyone please show me the steps to this one? I think i am trying too hard.
Click to expand...
9/0.8. You want the 0.8 to be a whole number (no decimals) so you move the decimal 1 place to the right and get 08 or 8. You must move the decimal of the 9 also 1 place to the right (basically you are multiply the top and bottom by 10 and 10/10 is 1 so no change in the value of the fraction will occur). The 9=9.0 so when you move the decimal you will get 90. That is 9/0.8 =90/8.
8 goes into 9 1 time with 1 left over. Now you do 8 into 10 which is 1 with 2 left over. Now do 8 into 20 which is 2 with 4 left over. Now do 8 into 40 which is 5 with 0 left over. So the answer is 11.25
 
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