2nd Grade 3-Digit Addition No Regrouping Worksheet with 20 Problems

3-digit addition no regrouping worksheet for 2nd grade with 20 problems, featuring a lizard logo and Math-Salamanders.com branding.

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Show Answer Key & Explanations Step-by-step solution for: 3 Digit Addition No Regrouping Worksheets

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The task involves solving 3-digit addition problems without regrouping. This means that the sum of digits in each column (ones, tens, hundreds) should not exceed 9, so there is no need to carry over any values to the next column.

Let's solve each problem step by step:

---

Problem 1:

\[
\begin{array}{r}
312 \\
+ 424 \\
\hline
\end{array}
\]
- Ones place: \(2 + 4 = 6\)
- Tens place: \(1 + 2 = 3\)
- Hundreds place: \(3 + 4 = 7\)

\[
\boxed{736}
\]

---

Problem 2:

\[
\begin{array}{r}
535 \\
+ 361 \\
\hline
\end{array}
\]
- Ones place: \(5 + 1 = 6\)
- Tens place: \(3 + 6 = 9\)
- Hundreds place: \(5 + 3 = 8\)

\[
\boxed{896}
\]

---

Problem 3:

\[
\begin{array}{r}
621 \\
+ 255 \\
\hline
\end{array}
\]
- Ones place: \(1 + 5 = 6\)
- Tens place: \(2 + 5 = 7\)
- Hundreds place: \(6 + 2 = 8\)

\[
\boxed{876}
\]

---

Problem 4:

\[
\begin{array}{r}
347 \\
+ 451 \\
\hline
\end{array}
\]
- Ones place: \(7 + 1 = 8\)
- Tens place: \(4 + 5 = 9\)
- Hundreds place: \(3 + 4 = 7\)

\[
\boxed{798}
\]

---

Problem 5:

\[
\begin{array}{r}
403 \\
+ 120 \\
+ 224 \\
\hline
\end{array}
\]
- Ones place: \(3 + 0 + 4 = 7\)
- Tens place: \(0 + 2 + 2 = 4\)
- Hundreds place: \(4 + 1 + 2 = 7\)

\[
\boxed{747}
\]

---

Problem 6:

\[
\begin{array}{r}
322 \\
+ 114 \\
+ 43 \\
\hline
\end{array}
\]
- Ones place: \(2 + 4 + 3 = 9\)
- Tens place: \(2 + 1 + 1 = 4\)
- Hundreds place: \(3 + 1 + 0 = 4\)

\[
\boxed{479}
\]

---

Problem 7:

\[
\begin{array}{r}
605 \\
+ 43 \\
+ 211 \\
\hline
\end{array}
\]
- Ones place: \(5 + 3 + 1 = 9\)
- Tens place: \(0 + 4 + 1 = 5\)
- Hundreds place: \(6 + 0 + 2 = 8\)

\[
\boxed{859}
\]

---

Problem 8:

\[
\begin{array}{r}
235 \\
+ 122 \\
+ 341 \\
\hline
\end{array}
\]
- Ones place: \(5 + 2 + 1 = 8\)
- Tens place: \(3 + 2 + 4 = 9\)
- Hundreds place: \(2 + 1 + 3 = 6\)

\[
\boxed{698}
\]

---

Problem 9:

\[
\begin{array}{r}
214 \\
+ 302 \\
+ 140 \\
\hline
\end{array}
\]
- Ones place: \(4 + 2 + 0 = 6\)
- Tens place: \(1 + 0 + 4 = 5\)
- Hundreds place: \(2 + 3 + 1 = 6\)

\[
\boxed{656}
\]

---

Problem 10:

\[
\begin{array}{r}
513 \\
+ 205 \\
+ 231 \\
\hline
\end{array}
\]
- Ones place: \(3 + 5 + 1 = 9\)
- Tens place: \(1 + 0 + 3 = 4\)
- Hundreds place: \(5 + 2 + 2 = 9\)

\[
\boxed{949}
\]

---

Problem 11:

\[
\begin{array}{r}
125 \\
+ 322 \\
+ 50 \\
\hline
\end{array}
\]
- Ones place: \(5 + 2 + 0 = 7\)
- Tens place: \(2 + 2 + 5 = 9\)
- Hundreds place: \(1 + 3 + 0 = 4\)

\[
\boxed{497}
\]

---

Problem 12:

\[
\begin{array}{r}
410 \\
+ 245 \\
+ 132 \\
\hline
\end{array}
\]
- Ones place: \(0 + 5 + 2 = 7\)
- Tens place: \(1 + 4 + 3 = 8\)
- Hundreds place: \(4 + 2 + 1 = 7\)

\[
\boxed{787}
\]

---

Problem 13:

\[
\begin{array}{r}
503 \\
+ 260 \\
+ 125 \\
\hline
\end{array}
\]
- Ones place: \(3 + 0 + 5 = 8\)
- Tens place: \(0 + 6 + 2 = 8\)
- Hundreds place: \(5 + 2 + 1 = 8\)

\[
\boxed{888}
\]

---

Problem 14:

\[
\begin{array}{r}
425 \\
+ 331 \\
+ 43 \\
\hline
\end{array}
\]
- Ones place: \(5 + 1 + 3 = 9\)
- Tens place: \(2 + 3 + 4 = 9\)
- Hundreds place: \(4 + 3 + 0 = 7\)

\[
\boxed{799}
\]

---

Problem 15:

\[
\begin{array}{r}
412 \\
+ 54 \\
+ 322 \\
\hline
\end{array}
\]
- Ones place: \(2 + 4 + 2 = 8\)
- Tens place: \(1 + 5 + 2 = 8\)
- Hundreds place: \(4 + 0 + 3 = 7\)

\[
\boxed{788}
\]

---

Problem 16:

\[
\begin{array}{r}
152 \\
+ 321 \\
+ 205 \\
\hline
\end{array}
\]
- Ones place: \(2 + 1 + 5 = 8\)
- Tens place: \(5 + 2 + 0 = 7\)
- Hundreds place: \(1 + 3 + 2 = 6\)

\[
\boxed{678}
\]

---

Problem 17:

\[
\begin{array}{r}
420 \\
+ 354 \\
+ 215 \\
\hline
\end{array}
\]
- Ones place: \(0 + 4 + 5 = 9\)
- Tens place: \(2 + 5 + 1 = 8\)
- Hundreds place: \(4 + 3 + 2 = 9\)

\[
\boxed{989}
\]

---

Problem 18:

\[
\begin{array}{r}
501 \\
+ 135 \\
+ 242 \\
\hline
\end{array}
\]
- Ones place: \(1 + 5 + 2 = 8\)
- Tens place: \(0 + 3 + 4 = 7\)
- Hundreds place: \(5 + 1 + 2 = 8\)

\[
\boxed{878}
\]

---

Problem 19:

\[
\begin{array}{r}
251 \\
+ 122 \\
+ 515 \\
\hline
\end{array}
\]
- Ones place: \(1 + 2 + 5 = 8\)
- Tens place: \(5 + 2 + 1 = 8\)
- Hundreds place: \(2 + 1 + 5 = 8\)

\[
\boxed{888}
\]

---

Problem 20:

\[
\begin{array}{r}
431 \\
+ 305 \\
+ 143 \\
\hline
\end{array}
\]
- Ones place: \(1 + 5 + 3 = 9\)
- Tens place: \(3 + 0 + 4 = 7\)
- Hundreds place: \(4 + 3 + 1 = 8\)

\[
\boxed{879}
\]

---

Final Answers:

\[
\boxed{
\begin{array}{cccc}
736 & 896 & 876 & 798 \\
747 & 479 & 859 & 698 \\
656 & 949 & 497 & 787 \\
888 & 799 & 788 & 678 \\
989 & 878 & 888 & 879 \\
\end{array}
}
\]

Parent Tip: Review the logic above to help your child master the concept of 3 digit addition worksheet no regrouping.

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