Oefen optellen met gemengde oefeningstypes!
- Question 1: 3 plus 2 equals blank.
- Question 2: blank plus 4 equals 9.
- Question 3: 3 plus 3 equals blank.
- Question 4: blank plus 1 equals 2.
- Question 5: blank plus 2 equals 4.
- Question 6: blank plus 4 equals 7.
