First of all, do you know what that √ sign means? If you don't, it is called a "square root". The number next to the square root is another number that has been multiplied by itself to give you the original number. For example, √49 = 7 because 7 x 7 = 49. Remember, it has to be the same number you multiply (multiplied by itself!).
In this question it is asking you to take away the results from √169 from √25. Look at the following steps on how to work it out!
2) Now, let's try to answer the question!
Right. It is asking you to do √169 - √25, so first of all we need to find what number √169 is. To find out, we can go through the "squared" times table until we get to 169:
* 1 x 1 = 1. This isn't the actual answer because we haven't got to a final answer of 169.
* 2 x 2 = 4. Not 169 yet, keep going through the "squared" times table until you get to 169.
* 3 x 3 = 9. Not 169 yet, keep going through the "squared" times table until you get to 169.
* 4 x 4 = 16. Keep going!
* 5 x 5 = 25. Keep going...
* 6 x 6 = 36.
* 7 x 7 = 49.
* 8 x 8 = 64.
* 9 x 9 = 81.
* 10 x 10 = 100.
* 11 x 11 = 121.
* 12 x 12 = 144. Great job, we're almost there!
* 13 x 13 = 169. We have finally got our answer after all that work! This means that √169 = 13!
Another faster way you could do is estimate a number which could be close to the answer. You could start at a number like like 11 x 11 rather than 1 x 1, because you know the answer is higher than 100. Now you only have three steps in total to find this.
3) Now we have to find the √25. Remember the method?
* 1 x 1 = 1. This isn't 25 yet, keep going through the "squared times table"!
* 2 x 2 = 4. Keep going!
* 3 x 3 = 9. Keep going!
* 4 x 4 = 16. We're almost there!
* 5 x 5 = 25. Yay, we've got to √25!!!
(Remember you can estimate the answer instead of going through the whole "squared times table"!)
This means that √25 = 5 because 5 x 5 = 25!
4) Gather your final data:
What did we get for √169? We got 13, remember? What did we get for √25? We got 5!
Remember what the actual question was: √169 - √25 = ?
SO, this means that we need to take away the number we got for √169 from √25.
Therefore, this would give us 13 - 5. AND, 13 - 5 = 8! So 8 is your final answer for the WHOLE question!
5) Write it out, your final answer is:
√169 - √25 = 8
* If you want to make the whole process easier for yourself, work out that √169 is 13, and √25 is 5, so take them away from each other: 13 - 5 = 8
Answers & Comments
Verified answer
Okay, I'll do my best to explain this! :)
1) Understand the question:
First of all, do you know what that √ sign means? If you don't, it is called a "square root". The number next to the square root is another number that has been multiplied by itself to give you the original number. For example, √49 = 7 because 7 x 7 = 49. Remember, it has to be the same number you multiply (multiplied by itself!).
In this question it is asking you to take away the results from √169 from √25. Look at the following steps on how to work it out!
2) Now, let's try to answer the question!
Right. It is asking you to do √169 - √25, so first of all we need to find what number √169 is. To find out, we can go through the "squared" times table until we get to 169:
* 1 x 1 = 1. This isn't the actual answer because we haven't got to a final answer of 169.
* 2 x 2 = 4. Not 169 yet, keep going through the "squared" times table until you get to 169.
* 3 x 3 = 9. Not 169 yet, keep going through the "squared" times table until you get to 169.
* 4 x 4 = 16. Keep going!
* 5 x 5 = 25. Keep going...
* 6 x 6 = 36.
* 7 x 7 = 49.
* 8 x 8 = 64.
* 9 x 9 = 81.
* 10 x 10 = 100.
* 11 x 11 = 121.
* 12 x 12 = 144. Great job, we're almost there!
* 13 x 13 = 169. We have finally got our answer after all that work! This means that √169 = 13!
Another faster way you could do is estimate a number which could be close to the answer. You could start at a number like like 11 x 11 rather than 1 x 1, because you know the answer is higher than 100. Now you only have three steps in total to find this.
3) Now we have to find the √25. Remember the method?
* 1 x 1 = 1. This isn't 25 yet, keep going through the "squared times table"!
* 2 x 2 = 4. Keep going!
* 3 x 3 = 9. Keep going!
* 4 x 4 = 16. We're almost there!
* 5 x 5 = 25. Yay, we've got to √25!!!
(Remember you can estimate the answer instead of going through the whole "squared times table"!)
This means that √25 = 5 because 5 x 5 = 25!
4) Gather your final data:
What did we get for √169? We got 13, remember? What did we get for √25? We got 5!
Remember what the actual question was: √169 - √25 = ?
SO, this means that we need to take away the number we got for √169 from √25.
Therefore, this would give us 13 - 5. AND, 13 - 5 = 8! So 8 is your final answer for the WHOLE question!
5) Write it out, your final answer is:
√169 - √25 = 8
* If you want to make the whole process easier for yourself, work out that √169 is 13, and √25 is 5, so take them away from each other: 13 - 5 = 8
I hope this helps! :D
169
169-25
square root of 169= 13 because 13*13=169.
minus the square root of 25 which is 5 because 5*5=25'
therefore the square root of 169 minus the square root of 25 is 13-5=?
which would be 8.
The square root of 169 is equal to 13... and the square root of 25 is equal to 5!
13 - 5 = 8! :)
The square root of 169 = 13.
Take away the square root of 25 = 5
13 - 5 = 8
Anybody answer mine please? I'll answer yours...
http://answers.yahoo.com/question/index?qid=201303...
PEMDAS
no parentheses so exponents (and roots is next) so 13 - 5
no multi or divison so subtract. I think you can work that one out.
For the best answers, search on this site https://shorturl.im/M9lo2
Yes, everyone (except chris) knows what the answer is.