Răspuns :
a) a + b + c +d= (a+b)+(c+d)=325+137=462
b) a + b - c - d=(a+b)-(c+d)=325-137=188
b) a + b - c - d=(a+b)-(c+d)=325-137=188
a) b)
a + b + c + d = 426 a + b - c - d = 188
325 + 137 = 426 325 - ( c + d ) =
325 - 137 = 188
a + b + c + d = 426 a + b - c - d = 188
325 + 137 = 426 325 - ( c + d ) =
325 - 137 = 188