To solve the double-digit addition and subtraction problems, we will work through each problem step by step. Here is the solution for each problem:
---
Problem 1:
Addition:
$$
10 + 15 = ?
$$
- Add the ones place: \( 0 + 5 = 5 \)
- Add the tens place: \( 1 + 1 = 2 \)
- Result: \( 25 \)
Answer:
$$
\boxed{25}
$$
---
Problem 2:
Subtraction:
$$
24 - 16 = ?
$$
- Subtract the ones place: \( 4 - 6 \). Since 4 is less than 6, borrow 1 from the tens place.
- After borrowing, \( 14 - 6 = 8 \)
- The tens place becomes \( 1 \) (after borrowing), so \( 1 - 1 = 0 \)
- Result: \( 8 \)
Answer:
$$
\boxed{8}
$$
---
Problem 3:
Addition:
$$
35 + 33 = ?
$$
- Add the ones place: \( 5 + 3 = 8 \)
- Add the tens place: \( 3 + 3 = 6 \)
- Result: \( 68 \)
Answer:
$$
\boxed{68}
$$
---
Problem 4:
Subtraction:
$$
49 - 32 = ?
$$
- Subtract the ones place: \( 9 - 2 = 7 \)
- Subtract the tens place: \( 4 - 3 = 1 \)
- Result: \( 17 \)
Answer:
$$
\boxed{17}
$$
---
Problem 5:
Addition:
$$
59 + 27 = ?
$$
- Add the ones place: \( 9 + 7 = 16 \). Write down 6 and carry over 1.
- Add the tens place: \( 5 + 2 + 1 = 8 \)
- Result: \( 86 \)
Answer:
$$
\boxed{86}
$$
---
Problem 6:
Subtraction:
$$
63 - 29 = ?
$$
- Subtract the ones place: \( 3 - 9 \). Since 3 is less than 9, borrow 1 from the tens place.
- After borrowing, \( 13 - 9 = 4 \)
- The tens place becomes \( 5 \) (after borrowing), so \( 5 - 2 = 3 \)
- Result: \( 34 \)
Answer:
$$
\boxed{34}
$$
---
Problem 7:
Addition:
$$
76 + 25 = ?
$$
- Add the ones place: \( 6 + 5 = 11 \). Write down 1 and carry over 1.
- Add the tens place: \( 7 + 2 + 1 = 10 \)
- Result: \( 101 \)
Answer:
$$
\boxed{101}
$$
---
Problem 8:
Subtraction:
$$
82 - 52 = ?
$$
- Subtract the ones place: \( 2 - 2 = 0 \)
- Subtract the tens place: \( 8 - 5 = 3 \)
- Result: \( 30 \)
Answer:
$$
\boxed{30}
$$
---
Problem 9:
Addition:
$$
13 + 12 = ?
$$
- Add the ones place: \( 3 + 2 = 5 \)
- Add the tens place: \( 1 + 1 = 2 \)
- Result: \( 25 \)
Answer:
$$
\boxed{25}
$$
---
Problem 10:
Subtraction:
$$
48 - 16 = ?
$$
- Subtract the ones place: \( 8 - 6 = 2 \)
- Subtract the tens place: \( 4 - 1 = 3 \)
- Result: \( 32 \)
Answer:
$$
\boxed{32}
$$
---
Final Answers:
$$
\boxed{25, 8, 68, 17, 86, 34, 101, 30, 25, 32}
$$
Parent Tip: Review the logic above to help your child master the concept of 2nd grade math practice sheets.
