Problem: Solve the following addition problems with regrouping in ones.
The worksheet contains 10 addition problems. We will solve each one step by step, showing the process of regrouping when necessary.
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Problem A:
$$
728 + 18
$$
1. Add the ones place: \(8 + 8 = 16\). Write down 6 and carry over 1.
2. Add the tens place: \(2 + 1 = 3\) (don't forget to add the carried-over 1).
3. Add the hundreds place: \(7 + 0 = 7\).
$$
728 + 18 = 746
$$
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Problem B:
$$
142 + 209
$$
1. Add the ones place: \(2 + 9 = 11\). Write down 1 and carry over 1.
2. Add the tens place: \(4 + 0 = 4\) (don't forget to add the carried-over 1).
3. Add the hundreds place: \(1 + 2 = 3\).
$$
142 + 209 = 351
$$
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Problem C:
$$
238 + 125
$$
1. Add the ones place: \(8 + 5 = 13\). Write down 3 and carry over 1.
2. Add the tens place: \(3 + 2 = 5\) (don't forget to add the carried-over 1).
3. Add the hundreds place: \(2 + 1 = 3\).
$$
238 + 125 = 363
$$
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Problem D:
$$
926 + 69
$$
1. Add the ones place: \(6 + 9 = 15\). Write down 5 and carry over 1.
2. Add the tens place: \(2 + 6 = 8\) (don't forget to add the carried-over 1).
3. Add the hundreds place: \(9 + 0 = 9\).
$$
926 + 69 = 995
$$
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Problem E:
$$
427 + 206
$$
1. Add the ones place: \(7 + 6 = 13\). Write down 3 and carry over 1.
2. Add the tens place: \(2 + 0 = 2\) (don't forget to add the carried-over 1).
3. Add the hundreds place: \(4 + 2 = 6\).
$$
427 + 206 = 633
$$
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Problem F:
$$
306 + 126
$$
1. Add the ones place: \(6 + 6 = 12\). Write down 2 and carry over 1.
2. Add the tens place: \(0 + 2 = 2\) (don't forget to add the carried-over 1).
3. Add the hundreds place: \(3 + 1 = 4\).
$$
306 + 126 = 432
$$
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Problem G:
$$
238 + 259
$$
1. Add the ones place: \(8 + 9 = 17\). Write down 7 and carry over 1.
2. Add the tens place: \(3 + 5 = 8\) (don't forget to add the carried-over 1).
3. Add the hundreds place: \(2 + 2 = 4\).
$$
238 + 259 = 497
$$
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Problem H:
$$
135 + 125
$$
1. Add the ones place: \(5 + 5 = 10\). Write down 0 and carry over 1.
2. Add the tens place: \(3 + 2 = 5\) (don't forget to add the carried-over 1).
3. Add the hundreds place: \(1 + 1 = 2\).
$$
135 + 125 = 260
$$
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Problem I:
$$
442 + 38
$$
1. Add the ones place: \(2 + 8 = 10\). Write down 0 and carry over 1.
2. Add the tens place: \(4 + 3 = 7\) (don't forget to add the carried-over 1).
3. Add the hundreds place: \(4 + 0 = 4\).
$$
442 + 38 = 480
$$
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Problem J:
$$
549 + 106
$$
1. Add the ones place: \(9 + 6 = 15\). Write down 5 and carry over 1.
2. Add the tens place: \(4 + 0 = 4\) (don't forget to add the carried-over 1).
3. Add the hundreds place: \(5 + 1 = 6\).
$$
549 + 106 = 655
$$
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Final Answers:
$$
\boxed{
\begin{aligned}
A. & \ 746 \\
B. & \ 351 \\
C. & \ 363 \\
D. & \ 995 \\
E. & \ 633 \\
F. & \ 432 \\
G. & \ 497 \\
H. & \ 260 \\
I. & \ 480 \\
J. & \ 655 \\
\end{aligned}
}
$$
Parent Tip: Review the logic above to help your child master the concept of three digit addition with regrouping worksheet.
