-2-8
81-(13)
-2-8= -10
81-13= 68
When adding numbers with like signs, add their absolute values then retain the sign.
-2 -8
-2 + (-8)
absolute values are 2 and 8
2 + 8 = 10
keep the negative sign from the original numbers, so the answer is
-10
81-(13)
81-13= 68
-2 -8
-2 + (-8)
absolute values are 2 and 8
2 + 8 = 10
keep the negative sign from the original numbers, so the answer is
-10