Question

ayudaa porfa y tambien pueden poner procedimiento porfa​

Answer 1

1. 5 - [7 - 2 - (1-9) -3 + 12] +4 =

5 - ( 7 - 2 +8 - 3 +12 ) +4

5 - (10+12) +4

5 - 22 +4 = 31

2. 1 - ( -3+6+1) - [4 - (6-3+1) - 2]

1-4-(4-4-2)

1-4-(-2)

1-4+2 = 1

3. 6-(-9+7-1)-[3-(5+4+6)-1]

6-(-3)-[3-(-5+4+6)-1]

6-(-3)-(3-5-1)

6+3-(3-5-1)

6+3-(-3)

6+3+3= 12

4. 28-[21-(12-3)-7]

28-(21-9-7)

28-5= 23

5. [-2+3×(2-5)÷3] - [(3-5+2)-2×(3-4)]

[-2+1×(2-5)] - [(3-5+2)-2×(3-4)

[-2+(-3)] - [0-2×(-1)]

(-2-3)-2

(-5)-2

-5-2= - 7