A farmer has 2 fields. Each field has 8 rows of corn. How many rows of corn are there in total? If he plants 10 more rows, how many rows will he have?

Sarah has 4 boxes of cookies. Each box has 5 cookies. How many cookies does she have altogether? If she eats 6 cookies, how many are left?

A toy store has 3 shelves. Each shelf holds 9 toys. How many toys are there in total? If 10 toys are sold, how many toys remain?

Jake has 6 packs of stickers. Each pack contains 3 stickers. How many stickers does he have in total? If he gives 5 stickers to his friend, how many does he have left?

Emma has 7 jars of marbles. Each jar has 2 marbles. How many marbles does she have altogether? If she loses 3 marbles, how many does she have now?

A gardener plants 4 rows of flowers. Each row has 5 flowers. How many flowers are there in total? If 8 flowers die, how many flowers are still alive?

A school has 3 classrooms. Each classroom has 10 desks. How many desks are there in total? If 5 desks are broken, how many desks are still usable?