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