Răspunsuri

2014-10-08T19:01:16+03:00
A+b+c+d =
= (a+b) + (c+d)
= 325+137 
= 462.

a+b-c-d =
= (a+b) - (c+d)
= a+b -c-d
= 325 - 137
= 188.
23 4 23
2014-10-08T19:01:35+03:00