There are 112 seats in the school auditorium. There are 7 seats in each row. There are 70 people seated, filling up full rows of seats. How many rows are empty

you would take 112÷7=16 then I added 7s until I got 70. which left 7 rows unseated

you divide 112 by 7 to find out how many rows there is and you get 16. there is 16 rows.  Then you divide 112 by 16 and you get 7. There is 7 rows that is empty