Oefen optellen met gemengde oefeningstypes!
- Question 1: blank plus 4 equals 9.
- Question 2: 2 plus 5 equals blank.
- Question 3: 2 plus 1 equals blank.
- Question 4: 4 plus 3 equals blank.
- Question 5: blank plus 4 equals 8.
- Question 6: blank plus 5 equals 10.