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