Find the missing number to make the addition correct!
- Question 1: blank plus 2 equals 4.
- Question 2: blank plus 1 equals 4.
- Question 3: blank plus 1 equals 3.
- Question 4: blank plus 2 equals 7.
- Question 5: blank plus 2 equals 3.
- Question 6: blank plus 2 equals 4.
