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sum and difference

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The sum and difference of two numbers 2018-08-30
Saranya pose la question :
Hi,

The question is to find the numbers from sum and difference.
The Sum = 14 and the difference = 2

I found in this web site some useful answers. but my kid is going second grade only. She don't know how to do a division or multiplication.
So can you please explain on how to find the answer using only the Addition and Subtraction.

Thanks in advance.

Penny Nom lui répond.
The sum and difference of two numbers 2018-03-13
samima pose la question :
Two numbers have a difference of 0.85 and the sum 1.What are the numbers?
Penny Nom lui répond.
The sum and difference of two numbers 2018-01-25
Ali pose la question :

Hello,
I was looking at the original question that was posted and answered by
your team:
http://mathcentral.uregina.ca/QQ/database/QQ.09.07/s/donna1.html

I used the 7 and 4 as example and not looking for 39 per original
question:

A=7
B=4

7+ 4 =11 and 7-4 = 3

We end up with 11 +3 = 14

A= 14/2 give use 7

B = how do you solve for B or 4 with out knowing anything about 3 or any other numbers ?

Thank you
Ali


Penny Nom lui répond.
The sum and difference of two numbers 2017-03-20
Olivia pose la question :
The sum of two numbers is 87 and their difference is 29. What are the two numbers
Penny Nom lui répond.
Sum and difference of two mystery numbers 2007-10-04
Donna pose la question :
The sum of two numbers is 39. The difference is 11. What are the numbers?
Stephen La Rocque lui répond.
 
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