Answer :
[tex]\sf{Heya~!}[/tex]
How you add and subtract with numbers ?
EXPLANATION :
To add 1 to another number, add 10 and then subtract 1: 1 + 10 = 9 + 10 - 1 = 19.
[tex]\mathbb{HOPE~IT~HELPS~YOU~!}[/tex]
[tex]\underline{Answer~:}[/tex]
[tex]\sf{Miwsow}[/tex]