¡Practica la suma con tipos de ejercicios mixtos!
- Question 1: blank plus 4 equals 6.
- Question 2: blank plus 2 equals 5.
- Question 3: blank plus 1 equals 4.
- Question 4: 4 plus 4 equals blank.
- Question 5: blank plus 2 equals 4.
- Question 6: blank plus 4 equals 7.
