It looks like you've uploaded a subtraction worksheet titled
"2 Digit Subtraction Sheet 1" from
Math-Salamanders.com, which contains several two-digit subtraction problems. Let's go through each problem step by step, solve them, and explain the process.
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🔢 Instructions:
> "Remember if the number in the top row is smaller than the number underneath that you are subtracting, you will need to 'borrow' or regroup from the tens column."
This means we’ll use
regrouping (borrowing) when needed.
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Let’s solve each problem:
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1)
```
3 9
- 1 5
-----
```
- Start with ones place: 9 - 5 = 4
- Tens place: 3 - 1 = 2
✔ Answer: 24
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2)
```
6 7
- 4 8
-----
```
- Ones place: 7 < 8 → borrow 1 from tens
- 17 - 8 = 9
- Tens place: 6 becomes 5 after borrowing; 5 - 4 = 1
✔ Answer: 19
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3)
```
8 2
- 1 3
-----
```
- Ones place: 2 < 3 → borrow 1 from tens
- 12 - 3 = 9
- Tens place: 8 becomes 7; 7 - 1 = 6
✔ Answer: 69
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4)
```
3 7
- 2 3
-----
```
- Ones: 7 - 3 = 4
- Tens: 3 - 2 = 1
✔ Answer: 14
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5)
```
4 3
- 2 5
-----
```
- Ones: 3 < 5 → borrow
- 13 - 5 = 8
- Tens: 4 becomes 3; 3 - 2 = 1
✔ Answer: 18
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6)
```
7 2
- 2 6
-----
```
- Ones: 2 < 6 → borrow
- 12 - 6 = 6
- Tens: 7 becomes 6; 6 - 2 = 4
✔ Answer: 46
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7)
```
8 4
- 5 3
-----
```
- Ones: 4 - 3 = 1
- Tens: 8 - 5 = 3
✔ Answer: 31
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8)
```
4 3
- 1 8
-----
```
- Ones: 3 < 8 → borrow
- 13 - 8 = 5
- Tens: 4 becomes 3; 3 - 1 = 2
✔ Answer: 25
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9)
```
5 7
- 4 5
-----
```
- Ones: 7 - 5 = 2
- Tens: 5 - 4 = 1
✔ Answer: 12
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10)
```
5 0
- 3 1
-----
```
- Ones: 0 < 1 → borrow from tens
- But tens is 5 → becomes 4, and 0 becomes 10
- 10 - 1 = 9
- Tens: 4 - 3 = 1
✔ Answer: 19
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11)
```
6 1
- 3 4
-----
```
- Ones: 1 < 4 → borrow
- 11 - 4 = 7
- Tens: 6 becomes 5; 5 - 3 = 2
✔ Answer: 27
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12)
```
7 3
- 2 8
-----
```
- Ones: 3 < 8 → borrow
- 13 - 8 = 5
- Tens: 7 becomes 6; 6 - 2 = 4
✔ Answer: 45
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✔ Final Answers:
| Problem | Answer |
|--------|--------|
| 1) | 24 |
| 2) | 19 |
| 3) | 69 |
| 4) | 14 |
| 5) | 18 |
| 6) | 46 |
| 7) | 31 |
| 8) | 25 |
| 9) | 12 |
| 10) | 19 |
| 11) | 27 |
| 12) | 45 |
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📌 Key Concepts Used:
-
Regrouping/Borrowing: When the bottom digit is larger than the top digit in a column, we borrow 1 from the next higher place value.
-
Subtracting from zero: If the top digit is 0 (like in problem 10), you must borrow from the tens place, turning it into 10.
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Let me know if you'd like this as a printable answer key or explained further for a child!
Parent Tip: Review the logic above to help your child master the concept of subtraction worksheet up to 50.
