50 + 8 = 58, as does 29 + 29 or 41 + 17.
93-58 equals = 35
2.58+13.35=15.95 258+1335=1593
366
309?
Seventy plus negative 12, or seventy minus 12 (same thing) is equal to 58.
58 + 7 + 7 = 72
58 + 37 = 95
58 + 12 = 70
58
12
The commutative property of addition.