5 OЫicz.
а) -13 + 11 =
-21 + 11 =
-8 + 11 =
b) -20 + (-5) =
-15 +(-5) =
12+(-5) =
-7+(-5) =
3+(-5) =
45 +(-5) =
-3 + 11 =
-19 + 11 =
-30 + 11 =