Three-digit addition worksheet for practice.
Worksheet with three-digit addition problems in oval boxes, titled "THREE DIGIT ADDITIONS" with spaces for name, score, and date, from Math Monks.
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ID: #778962
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Show Answer Key & Explanations
Step-by-step solution for: 3 Digit Addition Worksheets with Answer Key
▼
Show Answer Key & Explanations
Step-by-step solution for: 3 Digit Addition Worksheets with Answer Key
The task involves solving a series of three-digit addition problems. Below, I will solve each problem step by step and provide the final answers.
---
```
729
+ 892
------
```
- Add the units place: \( 9 + 2 = 11 \). Write down 1 and carry over 1.
- Add the tens place: \( 2 + 9 + 1 (\text{carry}) = 12 \). Write down 2 and carry over 1.
- Add the hundreds place: \( 7 + 8 + 1 (\text{carry}) = 16 \).
Final answer: \( 1621 \)
---
```
201
+ 814
------
```
- Add the units place: \( 1 + 4 = 5 \).
- Add the tens place: \( 0 + 1 = 1 \).
- Add the hundreds place: \( 2 + 8 = 10 \).
Final answer: \( 1015 \)
---
```
196
+ 236
------
```
- Add the units place: \( 6 + 6 = 12 \). Write down 2 and carry over 1.
- Add the tens place: \( 9 + 3 + 1 (\text{carry}) = 13 \). Write down 3 and carry over 1.
- Add the hundreds place: \( 1 + 2 + 1 (\text{carry}) = 4 \).
Final answer: \( 432 \)
---
```
664
+ 232
------
```
- Add the units place: \( 4 + 2 = 6 \).
- Add the tens place: \( 6 + 3 = 9 \).
- Add the hundreds place: \( 6 + 2 = 8 \).
Final answer: \( 896 \)
---
```
495
+ 178
------
```
- Add the units place: \( 5 + 8 = 13 \). Write down 3 and carry over 1.
- Add the tens place: \( 9 + 7 + 1 (\text{carry}) = 17 \). Write down 7 and carry over 1.
- Add the hundreds place: \( 4 + 1 + 1 (\text{carry}) = 6 \).
Final answer: \( 673 \)
---
```
835
+ 707
------
```
- Add the units place: \( 5 + 7 = 12 \). Write down 2 and carry over 1.
- Add the tens place: \( 3 + 0 + 1 (\text{carry}) = 4 \).
- Add the hundreds place: \( 8 + 7 = 15 \).
Final answer: \( 1542 \)
---
```
498
+ 553
------
```
- Add the units place: \( 8 + 3 = 11 \). Write down 1 and carry over 1.
- Add the tens place: \( 9 + 5 + 1 (\text{carry}) = 15 \). Write down 5 and carry over 1.
- Add the hundreds place: \( 4 + 5 + 1 (\text{carry}) = 10 \).
Final answer: \( 1051 \)
---
```
972
+ 153
------
```
- Add the units place: \( 2 + 3 = 5 \).
- Add the tens place: \( 7 + 5 = 12 \). Write down 2 and carry over 1.
- Add the hundreds place: \( 9 + 1 + 1 (\text{carry}) = 11 \).
Final answer: \( 1125 \)
---
```
792
+ 135
------
```
- Add the units place: \( 2 + 5 = 7 \).
- Add the tens place: \( 9 + 3 = 12 \). Write down 2 and carry over 1.
- Add the hundreds place: \( 7 + 1 + 1 (\text{carry}) = 9 \).
Final answer: \( 927 \)
---
```
888
+ 249
------
```
- Add the units place: \( 8 + 9 = 17 \). Write down 7 and carry over 1.
- Add the tens place: \( 8 + 4 + 1 (\text{carry}) = 13 \). Write down 3 and carry over 1.
- Add the hundreds place: \( 8 + 2 + 1 (\text{carry}) = 11 \).
Final answer: \( 1137 \)
---
```
189
+ 918
------
```
- Add the units place: \( 9 + 8 = 17 \). Write down 7 and carry over 1.
- Add the tens place: \( 8 + 1 + 1 (\text{carry}) = 10 \). Write down 0 and carry over 1.
- Add the hundreds place: \( 1 + 9 + 1 (\text{carry}) = 11 \).
Final answer: \( 1107 \)
---
```
649
+ 232
------
```
- Add the units place: \( 9 + 2 = 11 \). Write down 1 and carry over 1.
- Add the tens place: \( 4 + 3 + 1 (\text{carry}) = 8 \).
- Add the hundreds place: \( 6 + 2 = 8 \).
Final answer: \( 881 \)
---
\[
\boxed{
\begin{array}{ccc}
1621 & 1015 & 432 \\
896 & 673 & 1542 \\
1051 & 1125 & 927 \\
1137 & 1107 & 881 \\
\end{array}
}
\]
---
Problem 1: \( 729 + 892 \)
```
729
+ 892
------
```
- Add the units place: \( 9 + 2 = 11 \). Write down 1 and carry over 1.
- Add the tens place: \( 2 + 9 + 1 (\text{carry}) = 12 \). Write down 2 and carry over 1.
- Add the hundreds place: \( 7 + 8 + 1 (\text{carry}) = 16 \).
Final answer: \( 1621 \)
---
Problem 2: \( 201 + 814 \)
```
201
+ 814
------
```
- Add the units place: \( 1 + 4 = 5 \).
- Add the tens place: \( 0 + 1 = 1 \).
- Add the hundreds place: \( 2 + 8 = 10 \).
Final answer: \( 1015 \)
---
Problem 3: \( 196 + 236 \)
```
196
+ 236
------
```
- Add the units place: \( 6 + 6 = 12 \). Write down 2 and carry over 1.
- Add the tens place: \( 9 + 3 + 1 (\text{carry}) = 13 \). Write down 3 and carry over 1.
- Add the hundreds place: \( 1 + 2 + 1 (\text{carry}) = 4 \).
Final answer: \( 432 \)
---
Problem 4: \( 664 + 232 \)
```
664
+ 232
------
```
- Add the units place: \( 4 + 2 = 6 \).
- Add the tens place: \( 6 + 3 = 9 \).
- Add the hundreds place: \( 6 + 2 = 8 \).
Final answer: \( 896 \)
---
Problem 5: \( 495 + 178 \)
```
495
+ 178
------
```
- Add the units place: \( 5 + 8 = 13 \). Write down 3 and carry over 1.
- Add the tens place: \( 9 + 7 + 1 (\text{carry}) = 17 \). Write down 7 and carry over 1.
- Add the hundreds place: \( 4 + 1 + 1 (\text{carry}) = 6 \).
Final answer: \( 673 \)
---
Problem 6: \( 835 + 707 \)
```
835
+ 707
------
```
- Add the units place: \( 5 + 7 = 12 \). Write down 2 and carry over 1.
- Add the tens place: \( 3 + 0 + 1 (\text{carry}) = 4 \).
- Add the hundreds place: \( 8 + 7 = 15 \).
Final answer: \( 1542 \)
---
Problem 7: \( 498 + 553 \)
```
498
+ 553
------
```
- Add the units place: \( 8 + 3 = 11 \). Write down 1 and carry over 1.
- Add the tens place: \( 9 + 5 + 1 (\text{carry}) = 15 \). Write down 5 and carry over 1.
- Add the hundreds place: \( 4 + 5 + 1 (\text{carry}) = 10 \).
Final answer: \( 1051 \)
---
Problem 8: \( 972 + 153 \)
```
972
+ 153
------
```
- Add the units place: \( 2 + 3 = 5 \).
- Add the tens place: \( 7 + 5 = 12 \). Write down 2 and carry over 1.
- Add the hundreds place: \( 9 + 1 + 1 (\text{carry}) = 11 \).
Final answer: \( 1125 \)
---
Problem 9: \( 792 + 135 \)
```
792
+ 135
------
```
- Add the units place: \( 2 + 5 = 7 \).
- Add the tens place: \( 9 + 3 = 12 \). Write down 2 and carry over 1.
- Add the hundreds place: \( 7 + 1 + 1 (\text{carry}) = 9 \).
Final answer: \( 927 \)
---
Problem 10: \( 888 + 249 \)
```
888
+ 249
------
```
- Add the units place: \( 8 + 9 = 17 \). Write down 7 and carry over 1.
- Add the tens place: \( 8 + 4 + 1 (\text{carry}) = 13 \). Write down 3 and carry over 1.
- Add the hundreds place: \( 8 + 2 + 1 (\text{carry}) = 11 \).
Final answer: \( 1137 \)
---
Problem 11: \( 189 + 918 \)
```
189
+ 918
------
```
- Add the units place: \( 9 + 8 = 17 \). Write down 7 and carry over 1.
- Add the tens place: \( 8 + 1 + 1 (\text{carry}) = 10 \). Write down 0 and carry over 1.
- Add the hundreds place: \( 1 + 9 + 1 (\text{carry}) = 11 \).
Final answer: \( 1107 \)
---
Problem 12: \( 649 + 232 \)
```
649
+ 232
------
```
- Add the units place: \( 9 + 2 = 11 \). Write down 1 and carry over 1.
- Add the tens place: \( 4 + 3 + 1 (\text{carry}) = 8 \).
- Add the hundreds place: \( 6 + 2 = 8 \).
Final answer: \( 881 \)
---
Final Answers:
\[
\boxed{
\begin{array}{ccc}
1621 & 1015 & 432 \\
896 & 673 & 1542 \\
1051 & 1125 & 927 \\
1137 & 1107 & 881 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of three number addition worksheet.
