Problem: Solve the 2-digit addition problems within 100, remembering to regroup if necessary.
#### Step-by-Step Solution:
1.
34 + 42
- Add the ones place: \( 4 + 2 = 6 \)
- Add the tens place: \( 3 + 4 = 7 \)
- Result: \( 76 \)
2.
26 + 35
- Add the ones place: \( 6 + 5 = 11 \) (regroup 1 ten)
- Add the tens place: \( 2 + 3 + 1 = 6 \)
- Result: \( 61 \)
3.
63 + 24
- Add the ones place: \( 3 + 4 = 7 \)
- Add the tens place: \( 6 + 2 = 8 \)
- Result: \( 87 \)
4.
55 + 17
- Add the ones place: \( 5 + 7 = 12 \) (regroup 1 ten)
- Add the tens place: \( 5 + 1 + 1 = 7 \)
- Result: \( 72 \)
5.
33 + 26
- Add the ones place: \( 3 + 6 = 9 \)
- Add the tens place: \( 3 + 2 = 5 \)
- Result: \( 59 \)
6.
68 + 23
- Add the ones place: \( 8 + 3 = 11 \) (regroup 1 ten)
- Add the tens place: \( 6 + 2 + 1 = 9 \)
- Result: \( 91 \)
7.
45 + 42
- Add the ones place: \( 5 + 2 = 7 \)
- Add the tens place: \( 4 + 4 = 8 \)
- Result: \( 87 \)
8.
56 + 23
- Add the ones place: \( 6 + 3 = 9 \)
- Add the tens place: \( 5 + 2 = 7 \)
- Result: \( 79 \)
9.
48 + 15
- Add the ones place: \( 8 + 5 = 13 \) (regroup 1 ten)
- Add the tens place: \( 4 + 1 + 1 = 6 \)
- Result: \( 63 \)
10.
27 + 25
- Add the ones place: \( 7 + 5 = 12 \) (regroup 1 ten)
- Add the tens place: \( 2 + 2 + 1 = 5 \)
- Result: \( 52 \)
11.
56 + 41
- Add the ones place: \( 6 + 1 = 7 \)
- Add the tens place: \( 5 + 4 = 9 \)
- Result: \( 97 \)
12.
38 + 24
- Add the ones place: \( 8 + 4 = 12 \) (regroup 1 ten)
- Add the tens place: \( 3 + 2 + 1 = 6 \)
- Result: \( 62 \)
13.
53 + 35
- Add the ones place: \( 3 + 5 = 8 \)
- Add the tens place: \( 5 + 3 = 8 \)
- Result: \( 88 \)
14.
39 + 12
- Add the ones place: \( 9 + 2 = 11 \) (regroup 1 ten)
- Add the tens place: \( 3 + 1 + 1 = 5 \)
- Result: \( 51 \)
15.
85 + 13
- Add the ones place: \( 5 + 3 = 8 \)
- Add the tens place: \( 8 + 1 = 9 \)
- Result: \( 98 \)
Final Answers:
\[
\boxed{
\begin{array}{lll}
1) & 76 & 6) & 91 & 11) & 97 \\
2) & 61 & 7) & 87 & 12) & 62 \\
3) & 87 & 8) & 79 & 13) & 88 \\
4) & 72 & 9) & 63 & 14) & 51 \\
5) & 59 & 10) & 52 & 15) & 98 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of addition worksheet with pictures for grade 2.
