a + b
1) а = 6 b = - 15
6 + ( - 15) = 6 - 15 = -9
2) a = 7.6 b = -5.3
7.6 + ( - 5.3 ) = 7.6 - 5.3 = 2.3
3) a = -5.7 b = 2.7
-5.7 + 2.7 = - 3
a + b
1) а = 6 b = - 15
6 + ( - 15) = 6 - 15 = -9
2) a = 7.6 b = -5.3
7.6 + ( - 5.3 ) = 7.6 - 5.3 = 2.3
3) a = -5.7 b = 2.7
-5.7 + 2.7 = - 3