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addition table

by LFalken » Mon Jun 15, 2009 4:25 pm
+ X Y Z
---------------------
4 1 -5 m

e 7 n 10

f 2 -4 5

In the addition table shown above, what is the value of m+n?


answer is = 5.......

Can someone please elaborate? This one has be stumped..
LFAL
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by dmateer25 » Mon Jun 15, 2009 5:40 pm
m = 4 + z
n = e + y

so now we have:

4 + z + e + y


Looking at the addition table we also see:
e + z = 10

So now we have

4 + 10 + y
14 + y

So now we just need y and we have the solution.

4+ y = -5
y = -9


Finally

14 + (-9) = 5
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by LFalken » Tue Jun 16, 2009 7:24 am
dmateer25 wrote:m = 4 + z
n = e + y

so now we have:

4 + z + e + y


Looking at the addition table we also see:
e + z = 10

So now we have

4 + 10 + y
14 + y

So now we just need y and we have the solution.

4+ y = -5
y = -9


Finally

14 + (-9) = 5
dmateer25, thank you! Very clear!
LFAL
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