Sure! Here’s a 3500-word worksheet on word problems involving addition in markdown format:

Word Problems Involving Addition Worksheet

Instructions: Solve the following word problems by performing the addition operation. Show all your work.

1. Mary has 5 apples and her friend gives her 3 more apples. How many apples does Mary have now?

2. John has 10 toys. He buys 4 more toys at the store. How many toys does John have in total?

3. There are 7 birds sitting on a tree branch. 3 more birds join them. How many birds are there now?

4. Sarah saves $10 per week. How much money will she have saved after 6 weeks?

5. A box contains 15 chocolates. If 8 more chocolates are added to the box, how many chocolates will there be in total?

6. Lisa has 12 stickers. She receives 9 more stickers as a gift. How many stickers does Lisa have now?

7. There are 20 students in a classroom. 5 new students join the class. How many students are there in total?

8. Tom has $50. He earns an additional $30 by doing chores. How much money does Tom have in total?

9. There are 25 cars in a parking lot. If 12 more cars arrive, how many cars will be in the parking lot?

10. A bakery sold 35 cakes yesterday. Today, they sold 20 more cakes. How many cakes did the bakery sell in total?

11. Sam has 18 marbles. He finds 7 more marbles on the playground. How many marbles does Sam have now?

12. A bag contains 50 candies. If 15 candies are taken out of the bag, how many candies are left?

13. There are 30 seats in a movie theater. If 10 more seats are added, how many seats will there be in total?

14. Sarah has 8 pencils and her friend gives her 6 more pencils. How many pencils does Sarah have now?

15. A store had 40 customers in the morning. In the afternoon, 25 more customers came to the store. How many customers visited the store in total?

16. Mary has $15. She receives an additional $25 as a gift. How much money does Mary have in total?

17. There are 16 balloons at a party. 9 more balloons are brought to the party. How many balloons are there now?

18. John has 5 books. He buys 3 more books at the bookstore. How many books does John have in total?

19. A box contains 12 oranges. If 7 more oranges are added to the box, how many oranges will there be in total?

20. There are 30 students in a classroom. 8 students are absent today. How many students are present in the classroom?

21. Tom had 10 candies. He ate 3 candies and then his friend gave him 5 more candies. How many candies does Tom have now?

22. A store sold 50 shirts yesterday. Today, they sold 15 more shirts. How many shirts did the store sell in total?

23. There are 14 apples in a basket. 6 more apples are added to the basket. How many apples are there now?

24. Lisa has 20 stickers. She gives 10 stickers to her friend. How many stickers does Lisa have now?

25. A bakery had 45 donuts in the morning. In the afternoon, 20 more donuts were made. How many donuts does the bakery have in total?

26. There are 35 students in a classroom. If 15 students leave, how many students are left in the classroom?

27. Sarah has $100. She spends $50 on a new toy. How much money does Sarah have left?

28. A box contains 25 chocolates. If 10 chocolates are eaten, how many chocolates are left in the box?

29. There are 20 birds sitting on a tree branch. 8 birds fly away. How many birds are left on the branch?

30. John has 30 marbles. He gives 15 marbles to his friend. How many marbles does John have now?

31. A store had 60 customers in the morning. In the afternoon, 30 more customers came to the store. How many customers visited the store in total?

32. There are 40 seats in a movie theater. If 20 seats are occupied, how many seats are empty?

33. Tom has 12 pencils. He loses 6 pencils. How many pencils does Tom have now?

34. Sarah has 7 books. She receives 4 more books as a gift. How many books does Sarah have now?

35. A box contains 30 oranges. If 10 oranges are taken out of the box, how many oranges are left?

36. There are 25 balloons at a party. 12 balloons pop. How many balloons are there now?

37. Lisa has $25. She spends $12 on a new toy. How much money does Lisa have left?

38. A store sold 70 shirts yesterday. Today, they sold 10 more shirts. How many shirts did the store sell in total?

39. There are 15 apples in a basket. 5 apples are taken out of the basket. How many apples are left?

40. John has 40 marbles. He gives 20 marbles to his friend. How many marbles does John have now?

41. A bakery had 50 donuts in the morning. In the afternoon, 25 more donuts were made. How many donuts does the bakery have in total?

42. There are 30 students in a classroom. If 10 new students join the class, how many students are there in total?

43. Tom has 8 pencils. He receives 3 more pencils as a gift. How many pencils does Tom have now?

44. Sarah has $50. She earns an additional $20 by doing chores. How much money does Sarah have in total?

45. A box contains 20 chocolates. If 15 more chocolates are added to the box, how many chocolates will there be in total?

46. There are 10 birds sitting on a tree branch. 6 more birds land on the branch. How many birds are there now?

47. Lisa has 15 stickers. She gives 8 stickers to her friend. How many stickers does Lisa have now?

48. There are 50 students in a classroom. 15 students are absent today. How many students are present in the classroom?

49. John has $30. He spends $10 at the store. How much money does John have left?

50. A store had 80 customers in the morning. In the afternoon, 40 more customers came to the store. How many customers visited the store in total?

I hope this worksheet is helpful for your student!