Place Value - Number Parts worksheet for Grade 3 students, focusing on converting expanded form to standard numbers.

Here are the solutions to the number parts problems. I have added the values together for each question to find the final number.

1. 400 + 80 + 7 = 487
2. 300 + 90 + 4 = 394
3. 600 + 90 = 690
4. 700 + 50 + 2 = 752
5. 900 + 80 + 3 = 983
6. 300 + 9 = 309 *(Remember to put a 0 in the tens place!)*
7. 200 + 40 + 6 = 246
8. 500 + 50 = 550
9. 900 + 30 + 3 = 933
10. 400 + 80 = 480
11. 3000 + 800 + 90 = 3890
12. 7000 + 300 + 7 = 7307 *(Don't forget the 0 in the tens place!)*
13. 4000 + 70 + 5 = 4075 *(Put a 0 in the hundreds place.)*
14. 2000 + 600 + 3 = 2603 *(Put a 0 in the tens place.)*
15. 5000 + 800 + 90 = 5890
16. 8000 + 9 = 8009 *(Put zeros in the hundreds and tens places.)*
17. 1000 + 800 + 70 = 1870
18. 7000 + 600 + 30 = 7630
19. 9000 + 300 + 9 = 9309 *(Put a 0 in the tens place.)*
20. 4000 + 70 + 2 = 4072 *(Put a 0 in the hundreds place.)*

Final Answer:
1. 487
2. 394
3. 690
4. 752
5. 983
6. 309
7. 246
8. 550
9. 933
10. 480
11. 3890
12. 7307
13. 4075
14. 2603
15. 5890
16. 8009
17. 1870
18. 7630
19. 9309
20. 4072