Here are 10 word problems that involve addition, subtraction, and multiplication with three-digit numbers:

Addition:

1. Maria bought 354 books and later purchased 278 more. How many books does Maria have now?

2. A factory produced 628 chairs on Monday and 412 on Tuesday. How many chairs did the factory produce in total over both days?

3. A school library has 538 science books and 465 math books. How many books are there altogether in the library?

4. John has 123 marbles, and his friend Tim gave him 274 more. How many marbles does John have now?

5. A bakery sold 732 cupcakes on Monday and 248 on Tuesday. How many cupcakes did the bakery sell in total?

Subtraction:

6. A warehouse had 763 boxes of toys. After shipping 284 boxes, how many boxes are left in the warehouse?

7. An airplane carried 992 passengers on a flight. After some passengers disembarked, 451 passengers remained. How many passengers got off the airplane?

8. A truck was loaded with 823 crates of fruit. After delivering 309 crates to a store, how many crates are left on the truck?

Multiplication:

9. A factory produces 152 toys per day. How many toys does the factory produce in 246 days?

10. A farmer has 312 apple trees in his orchard. Each tree produces 153 apples. How many apples does the farmer harvest in total?

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Would you like to go over the solutions or ask any clarifications?

Here are some related questions you can explore:

1. How do you solve word problems involving mixed operations?
2. What strategies can help you improve solving word problems quickly?
3. How do you handle large multiplication problems with 3-digit numbers?
4. How do you check your work for word problems involving addition or subtraction?
5. Can you solve multi-step word problems involving addition, subtraction, and multiplication?

Tip: When tackling word problems, break the problem down into smaller steps. Identify the key information, write down the operation, and solve it step by step.