Oefen optellen met gemengde oefeningstypes!
- Question 1: blank plus 3 equals 5.
- Question 2: blank plus 5 equals 10.
- Question 3: blank plus 4 equals 7.
- Question 4: 2 plus 2 equals blank.
- Question 5: 3 plus 1 equals blank.
- Question 6: blank plus 3 equals 4.
