Oefen optellen met gemengde oefeningstypes!
- Question 1: 3 plus 1 equals blank.
- Question 2: blank plus 2 equals 7.
- Question 3: blank plus 2 equals 6.
- Question 4: 3 plus 3 equals blank.
- Question 5: blank plus 5 equals 8.
- Question 6: blank plus 5 equals 6.
