Answer:
= 2
=4
=6
=8
=10
=12
=14
=16
=18
=20
number 1. 1+1=2
2. 2+2= 4
3.3+3= 6
4. 4+4=8
5.5+5=5
6. 6+6=12
7. 7+7=14
8.8+8=16
9.9+9=18
10.10+10+=20