Grade 3 Number Worksheets | Free Worksheets | Printables - Free Printable

Problem Description:

The task involves solving a series of addition problems where numbers are broken into their place values (hundreds, tens, and ones). The goal is to combine these parts to form the complete number.

Solution Approach:

1. Understand Place Values: Each number is given in expanded form, showing its hundreds, tens, and ones components.
2. Add the Components: Sum the hundreds, tens, and ones to get the final number.
3. Repeat for All Problems: Apply the same method to each problem in the worksheet.

Step-by-Step Solutions:

#### Problems 1–10:
1. \( 400 + 80 + 7 = 487 \)
- Hundreds: 400
- Tens: 80
- Ones: 7
- Total: \( 400 + 80 + 7 = 487 \)

2. \( 300 + 90 + 4 = 394 \)
- Hundreds: 300
- Tens: 90
- Ones: 4
- Total: \( 300 + 90 + 4 = 394 \)

3. \( 600 + 90 = 690 \)
- Hundreds: 600
- Tens: 90
- Ones: 0
- Total: \( 600 + 90 = 690 \)

4. \( 700 + 50 + 2 = 752 \)
- Hundreds: 700
- Tens: 50
- Ones: 2
- Total: \( 700 + 50 + 2 = 752 \)

5. \( 900 + 80 + 3 = 983 \)
- Hundreds: 900
- Tens: 80
- Ones: 3
- Total: \( 900 + 80 + 3 = 983 \)

6. \( 300 + 9 = 309 \)
- Hundreds: 300
- Tens: 0
- Ones: 9
- Total: \( 300 + 9 = 309 \)

7. \( 200 + 40 + 6 = 246 \)
- Hundreds: 200
- Tens: 40
- Ones: 6
- Total: \( 200 + 40 + 6 = 246 \)

8. \( 500 + 50 = 550 \)
- Hundreds: 500
- Tens: 50
- Ones: 0
- Total: \( 500 + 50 = 550 \)

9. \( 900 + 30 + 3 = 933 \)
- Hundreds: 900
- Tens: 30
- Ones: 3
- Total: \( 900 + 30 + 3 = 933 \)

10. \( 400 + 80 = 480 \)
- Hundreds: 400
- Tens: 80
- Ones: 0
- Total: \( 400 + 80 = 480 \)

#### Problems 11–20:
11. \( 3000 + 800 + 90 = 3890 \)
- Thousands: 3000
- Hundreds: 800
- Tens: 90
- Ones: 0
- Total: \( 3000 + 800 + 90 = 3890 \)

12. \( 7000 + 300 + 7 = 7307 \)
- Thousands: 7000
- Hundreds: 300
- Tens: 0
- Ones: 7
- Total: \( 7000 + 300 + 7 = 7307 \)

13. \( 4000 + 70 + 5 = 4075 \)
- Thousands: 4000
- Hundreds: 0
- Tens: 70
- Ones: 5
- Total: \( 4000 + 70 + 5 = 4075 \)

14. \( 2000 + 600 + 3 = 2603 \)
- Thousands: 2000
- Hundreds: 600
- Tens: 0
- Ones: 3
- Total: \( 2000 + 600 + 3 = 2603 \)

15. \( 5000 + 800 + 90 = 5890 \)
- Thousands: 5000
- Hundreds: 800
- Tens: 90
- Ones: 0
- Total: \( 5000 + 800 + 90 = 5890 \)

16. \( 8000 + 9 = 8009 \)
- Thousands: 8000
- Hundreds: 0
- Tens: 0
- Ones: 9
- Total: \( 8000 + 9 = 8009 \)

17. \( 1000 + 800 + 70 = 1870 \)
- Thousands: 1000
- Hundreds: 800
- Tens: 70
- Ones: 0
- Total: \( 1000 + 800 + 70 = 1870 \)

18. \( 7000 + 600 + 30 = 7630 \)
- Thousands: 7000
- Hundreds: 600
- Tens: 30
- Ones: 0
- Total: \( 7000 + 600 + 30 = 7630 \)

19. \( 9000 + 300 + 9 = 9309 \)
- Thousands: 9000
- Hundreds: 300
- Tens: 0
- Ones: 9
- Total: \( 9000 + 300 + 9 = 9309 \)

20. \( 4000 + 70 + 2 = 4072 \)
- Thousands: 4000
- Hundreds: 0
- Tens: 70
- Ones: 2
- Total: \( 4000 + 70 + 2 = 4072 \)

Final Answers:

\[
\boxed{
\begin{array}{ll}
1. 487 & 11. 3890 \\
2. 394 & 12. 7307 \\
3. 690 & 13. 4075 \\
4. 752 & 14. 2603 \\
5. 983 & 15. 5890 \\
6. 309 & 16. 8009 \\
7. 246 & 17. 1870 \\
8. 550 & 18. 7630 \\
9. 933 & 19. 9309 \\
10. 480 & 20. 4072 \\
\end{array}
}
\]