Tap For the first two problems, tap to write an equation that matches the model. For the second two problems, tap to choose emojis for your model. Then tap to cross out and show subtraction and then write the difference. In the tool tap :record: and use the to explain your work. Tap to save.
I know of variety of strategies for adding and subtracting numbers within 20 (the numbers 0-9). I can solve problems using objects, drawings, and even equations.