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