Problem: Double Digit Addition
The task is to solve each double-digit addition problem provided in the image. Let's go through each problem step by step.
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First Row:
1.
15 + 10
- Add the tens place: \(10 + 10 = 20\)
- Add the ones place: \(5 + 0 = 5\)
- Combine: \(20 + 5 = 25\)
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Answer: 25
2.
13 + 11
- Add the tens place: \(10 + 10 = 20\)
- Add the ones place: \(3 + 1 = 4\)
- Combine: \(20 + 4 = 24\)
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Answer: 24
3.
12 + 10
- Add the tens place: \(10 + 10 = 20\)
- Add the ones place: \(2 + 0 = 2\)
- Combine: \(20 + 2 = 22\)
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Answer: 22
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Second Row:
4.
14 + 11
- Add the tens place: \(10 + 10 = 20\)
- Add the ones place: \(4 + 1 = 5\)
- Combine: \(20 + 5 = 25\)
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Answer: 25
5.
16 + 13
- Add the tens place: \(10 + 10 = 20\)
- Add the ones place: \(6 + 3 = 9\)
- Combine: \(20 + 9 = 29\)
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Answer: 29
6.
15 + 12
- Add the tens place: \(10 + 10 = 20\)
- Add the ones place: \(5 + 2 = 7\)
- Combine: \(20 + 7 = 27\)
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Answer: 27
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Third Row:
7.
18 + 11
- Add the tens place: \(10 + 10 = 20\)
- Add the ones place: \(8 + 1 = 9\)
- Combine: \(20 + 9 = 29\)
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Answer: 29
8.
16 + 14
- Add the tens place: \(10 + 10 = 20\)
- Add the ones place: \(6 + 4 = 10\)
- Combine: \(20 + 10 = 30\)
-
Answer: 30
9.
15 + 15
- Add the tens place: \(10 + 10 = 20\)
- Add the ones place: \(5 + 5 = 10\)
- Combine: \(20 + 10 = 30\)
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Answer: 30
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Final Answers:
1. \(15 + 10 = \boxed{25}\)
2. \(13 + 11 = \boxed{24}\)
3. \(12 + 10 = \boxed{22}\)
4. \(14 + 11 = \boxed{25}\)
5. \(16 + 13 = \boxed{29}\)
6. \(15 + 12 = \boxed{27}\)
7. \(18 + 11 = \boxed{29}\)
8. \(16 + 14 = \boxed{30}\)
9. \(15 + 15 = \boxed{30}\)
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Final Boxed Answers:
\[
\boxed{25, 24, 22, 25, 29, 27, 29, 30, 30}
\]
Parent Tip: Review the logic above to help your child master the concept of mathematics 1 worksheet.
