Help resolve 3 and 5

Step-by-step explanation:

#3 - a) (+12)+(+7)+(+5) = 24

b)9+(+3)+0+(+7) = 19

c)(+8)+3+(+7)+(+5) = 23

d)(+12)+5+(+5)+8 = 30

e)(+1)+(+2)+(+3)+(+4) = 10

#5 - a) (+3)+(+8) =11

b) (+9)+(+1) = 10

c) (+11)+0 =11

d) (-1)+ (-3) = -4

e) (-12)+(-6) = -18

f) (-4)+(-2) = -6

g)(-7)+(-2) = -9

h)(+13)+(-20) = -7,sorry at this point I'm so bored ,so i am going to give u the answers only

i) -29

j) -11

k)-15

l) 17

the answer is 4.8 units on e2020.