Solve the addition problems presented in the image, filling in the blank white boxes.

Here's how to solve the problems shown in the image:

Each column represents an addition problem. We need to fill in the blank white boxes.

Let's analyze one column:

1. The blue beads represent the first number. There are 10 blue beads, and the number 10 is also indicated in a purple box next to them. This means the first number is 10.
2. The red beads represent the second number. There are 10 red beads. This means the second number is 10.
3. The number line shows the blue beads covering 0 to 10, and the red beads covering 10 to 20. This visually represents $10 +