Question

2+2=5
4+4=10
6+6=15
8+8=20
1+1=?​

Answer 1

Answer:

2+2+1=5

4+4+2=10

6+6+3=15

8+8+4=20

1+1+5=7

Answer 2

Step-by-step explanation:

$2 + 2 = 5 \\ 4 + 4 = 10 \\ 6 + 6 = 15 \\ 8 + 8 = 20 \\ 1 + 1 = 0$