$${\mathtt{9}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}} = {\mathtt{19}}$$ example is that if you have 9 dog and you what more ten more other dog so when you count your dog you fet 19 dog you will have.
$${\mathtt{9}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}} = {\mathtt{19}}$$ example is that if you have 9 dog and you what more ten more other dog so when you count your dog you fet 19 dog you will have.