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