Question

(79-81)-(39-81); (-39+15)-(5-39); (-78+23)+(27+78); (105-48)-(62+105)

Answer 1

(79-81)-(39-81) = -44
(-39+15)-(5-39)=-58
(-78+23)+(27+78)= -50
(105-48)-(62+105) = -110

Answer 2

Let's solve each of the given expressions step by step:

1. (79-81)-(39-81) First, perform the subtraction within the parentheses: = (-2) - (-42) Remember that subtracting a negative number is the same as adding a positive number: = (-2) + 42 = 40

2. (-39+15)-(5-39) Again, start by performing the subtraction within the parentheses: = (-39 + 15) - (5 - 39) = (-24) - (-34) = (-24) + 34 = 10

3. (-78+23)+(27+78) Add the numbers within the parentheses first: = (-78 + 23) + (27 + 78) = (-55) + (105) = 50

4. (105-48)-(62+105) Subtract within the parentheses: = (105 - 48) - (62 + 105) = 57 - 167 = -110

To summarize:

1. (79-81)-(39-81) = 40
2. (-39+15)-(5-39) = 10
3. (-78+23)+(27+78) = 50
4. (105-48)-(62+105) = -110