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