Addition is a lot like counting.
1. If you had 1 fish sticker:
Then a friend gave you 1 more fish sticker:
You would have 2 fish stickers:
The math for this would be: 1 + 1 = 2
2. If you got 3 more stickers for doing a chore:
You would add 3 to the 2 fish stickers you already have, so you would have 5 fish stickers:
The math for this would be: 2 + 3 = 5
3. If you bought 2 more stickers from your allowance:
That would add 2 stickers to the 5 stickers you already had, so you would have 7 stickers:
The math would be 5 + 2 = 7
4. If one of your birthday cards had 3 stickers in it:
Then you would add 3 stickers to your 7 stickers, so you would have 10 stickers:
The math would be 7 + 3 = 10
Here is a page that just shows the 10 fish. You can print them and use them to play with addition if you want.
Here is a page that just shows the 10 fish outlines so you can color them in. You can print them and use them to play with addition if you want.