This image contains a worksheet with nine subtraction problems, each set up in a "Tens" and "Ones" column format. The task is to solve each of these two-digit subtraction problems.
I will solve each problem one by one, showing the calculation for each.
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Problem 1: 71 - 39
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Ones column: 1 - 9. Since 1 is smaller than 9, we need to borrow from the tens column.
- Borrow 1 from the 7 (tens), making it 6. The 1 in the ones column becomes 11.
- 11 - 9 = 2.
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Tens column: 6 - 3 = 3.
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Answer: 32
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Problem 2: 61 - 46
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Ones column: 1 - 6. Borrow from the tens column.
- Borrow 1 from the 6 (tens), making it 5. The 1 in the ones column becomes 11.
- 11 - 6 = 5.
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Tens column: 5 - 4 = 1.
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Answer: 15
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Problem 3: 31 - 18
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Ones column: 1 - 8. Borrow from the tens column.
- Borrow 1 from the 3 (tens), making it 2. The 1 in the ones column becomes 11.
- 11 - 8 = 3.
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Tens column: 2 - 1 = 1.
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Answer: 13
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Problem 4: 51 - 23
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Ones column: 1 - 3. Borrow from the tens column.
- Borrow 1 from the 5 (tens), making it 4. The 1 in the ones column becomes 11.
- 11 - 3 = 8.
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Tens column: 4 - 2 = 2.
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Answer: 28
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Problem 5: 91 - 64
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Ones column: 1 - 4. Borrow from the tens column.
- Borrow 1 from the 9 (tens), making it 8. The 1 in the ones column becomes 11.
- 11 - 4 = 7.
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Tens column: 8 - 6 = 2.
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Answer: 27
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Problem 6: 81 - 32
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Ones column: 1 - 2. Borrow from the tens column.
- Borrow 1 from the 8 (tens), making it 7. The 1 in the ones column becomes 11.
- 11 - 2 = 9.
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Tens column: 7 - 3 = 4.
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Answer: 49
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Problem 7: 41 - 25
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Ones column: 1 - 5. Borrow from the tens column.
- Borrow 1 from the 4 (tens), making it 3. The 1 in the ones column becomes 11.
- 11 - 5 = 6.
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Tens column: 3 - 2 = 1.
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Answer: 16
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Problem 8: 81 - 49
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Ones column: 1 - 9. Borrow from the tens column.
- Borrow 1 from the 8 (tens), making it 7. The 1 in the ones column becomes 11.
- 11 - 9 = 2.
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Tens column: 7 - 4 = 3.
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Answer: 32
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Problem 9: 91 - 47
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Ones column: 1 - 7. Borrow from the tens column.
- Borrow 1 from the 9 (tens), making it 8. The 1 in the ones column becomes 11.
- 11 - 7 = 4.
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Tens column: 8 - 4 = 4.
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Answer: 44
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Final Answers:
The completed worksheet should have the following answers filled in:
- Row 1:
32,
15,
13
- Row 2:
28,
27,
49
- Row 3:
16,
32,
44
This completes the task. Each problem was solved using standard two-digit subtraction with borrowing where necessary.
Parent Tip: Review the logic above to help your child master the concept of regrouping subtraction worksheet 1st.
