Okay so 9 is close to ten so 9 becomes a 10
10+10
Now you break it down
5+5+5+5
You need to prove that 5 is a 5
break it down
2+3+2+3+2+3+2+3
Add up all the twos
2+2+2+2
6
what you have left
3+3+3+3
12
Divide the 6 and the 12 by two
3+6=9
You have found the 9 in 19, now to find the 10
Back from the beginning,
10/2=5
Break down the 5
2+3
break down the two
1+1+3
1+1+3=5
round 5 up to 10
9+10=19
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