Answer: 1739

1. 2 is less than 3: regroup 1 ten from the next column → 12 − 3 = 9
2. 0 lent 1 to the column before, so regroup again: this column becomes 9 → 9 − 6 = 3
3. 4 is less than 7: regroup 1 ten from the next column → 14 − 7 = 7
4. 2 − 1 = 1

Answer: 4189

1. 8 is less than 9: regroup 1 ten from the next column → 18 − 9 = 9
2. 2 is less than 4: regroup 1 ten from the next column → 12 − 4 = 8
3. 4 − 3 = 1
4. 6 − 2 = 4

Answer: 1358

1. 1 is less than 3: regroup 1 ten from the next column → 11 − 3 = 8
2. 6 − 1 = 5
3. 9 − 6 = 3
4. 4 − 3 = 1

Answer: 369

1. 0 is less than 1: regroup 1 ten from the next column → 10 − 1 = 9
2. 6 − 0 = 6
3. 1 is less than 8: regroup 1 ten from the next column → 11 − 8 = 3
4. 3 − 3 = 0

Answer: 1062

1. 7 − 5 = 2
2. 6 − 0 = 6
3. 0 − 0 = 0
4. 2 − 1 = 1

Answer: 2084

1. 4 − 0 = 4
2. 9 − 1 = 8
3. 5 − 5 = 0
4. 5 − 3 = 2

Answer: 2029

1. 6 is less than 7: regroup 1 ten from the next column → 16 − 7 = 9
2. 5 − 3 = 2
3. 9 − 9 = 0
4. 8 − 6 = 2

Answer: 2124

1. 7 − 3 = 4
2. 4 − 2 = 2
3. 3 − 2 = 1
4. 3 − 1 = 2

Answer: 434

1. 5 − 1 = 4
2. 6 − 3 = 3
3. 1 is less than 7: regroup 1 ten from the next column → 11 − 7 = 4
4. 6 − 6 = 0

Answer: 544

1. 5 − 1 = 4
2. 9 − 5 = 4
3. 6 − 1 = 5
4. 3 − 3 = 0

Answer: 544

1. 4 − 0 = 4
2. 1 is less than 7: regroup 1 ten from the next column → 11 − 7 = 4
3. 8 − 3 = 5
4. 2 − 2 = 0

Answer: 1262

1. 1 is less than 9: regroup 1 ten from the next column → 11 − 9 = 2
2. 7 − 1 = 6
3. 9 − 7 = 2
4. 2 − 1 = 1

Answer: 755

1. 8 − 3 = 5
2. 6 − 1 = 5
3. 0 is less than 3: regroup 1 ten from the next column → 10 − 3 = 7
4. 1 − 1 = 0

Answer: 1607

1. 3 is less than 6: regroup 1 ten from the next column → 13 − 6 = 7
2. 5 − 5 = 0
3. 2 is less than 6: regroup 1 ten from the next column → 12 − 6 = 6
4. 5 − 4 = 1

Answer: 201

1. 2 − 1 = 1
2. 3 − 3 = 0
3. 9 − 7 = 2
4. 5 − 5 = 0

Answer: 2670

1. 6 − 6 = 0
2. 2 is less than 5: regroup 1 ten from the next column → 12 − 5 = 7
3. 1 is less than 5: regroup 1 ten from the next column → 11 − 5 = 6
4. 4 − 2 = 2