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