To add with single digit numbers you just need to count.
You can regroup too, depending on what numbers you're using. I can give you some examples if you'd like!
1 + 2 = 3 because you need to just count. If I have one apple and you have two, count to see how many apples we have altogether. In this case, we have three apples.
What about 9 + 9? You would regroup because our answer is bigger than ten. If I have nine pennies and you have nine pennies, and we put them all together you'd have 18. Just count like before ^
