Adding Zero
equals 1
What is 1+0?
from 3
What is 3-1=2?
equals 4
What is 2+2=4?
from 4
What is 4-2=2?
equals 5
What is 3+2=5?
equals 3
What is 3+1?
from 5
What is 5-1=4?
equals 5
What is 3+2=5?
from 6
What is 6-2=4?
equals 7
What is 5+2=7?
equals 6
What is 6+0?
from 9
What is 9-1=8?
equals 9
What is 7+2=9?
from 7
What is 7-2=5?
equals 11
What is 9+3=11?
equals 10
What is 10+0?
from 15
What is 15-1=14?
equals 13
What is 11+2=13?
from 13
What is 13-2=11?
equals 17
What is 14+3=17?
equals 22
What is 22+0?
from 20
What is 20-1=19?
equals 17
What is 15+2=19?
from 20
What is 20-2=18?
equals 20
What is 17+3=20?