This colorful online activity or game allows a child to practice the concept of number bonds.
The child can either work with pictures (jewels) or with numbers.
In each exercise, the number at the top is the sum. The child will choose from several possible numbers of jewels, or just numbers, to fill in the missing quantity (or number).
You can also choose the number range. For kindergarten and the beginning of first grade, I suggest a range of 1 to 10. After that, it can be expanded to 20 and beyond.
Screenshots from the game: