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Detailed Explanation of Adding Two-Digit Numbers with Regrouping ➕🔄

When we add two-digit numbers that need regrouping, it means the numbers in the tens and ones places can be too big and we need to carry some over to the next column. This is called adding two-digit numbers with regrouping.

What Does Regrouping Mean? 🤔

Regrouping means moving ten ones into the tens column. It’s like when you have 10 ones, you can swap them for 1 ten.

Steps to Add Two-Digit Numbers with Regrouping 🪜

Let’s say we want to add 47 + 36.

  1. Write the numbers one under the other:
    Put 47 on top and 36 below it, lining up the tens and ones columns.
  2. Start with the ones column:
    Add 7 (ones in 47) + 6 (ones in 36) = 13 ones.
  3. Regroup if needed:
    13 is more than 9, so we keep 3 in the ones place and carry over 1 ten to the tens column.
  4. Add the tens column plus the carried ten:
    4 (tens in 47) + 3 (tens in 36) + 1 (carried over) = 8 tens.
  5. Write the answer:
    The final answer is 83.

Example ✍️

  4 7  
+ 3 6  
------
  8 3

So, 47 + 36 = 83 with regrouping.

Practice Tip 💡

When you add two-digit numbers with regrouping, always start with the ones. Remember to carry over 1 if your answer is more than 9. It helps to use your fingers or draw dots to count.

Adding two-digit numbers with regrouping is fun once you practice these steps!

20 Examination-Style Questions with Answers on Adding Two-Digit Numbers with Regrouping for Year 2 📝🎓

Here are 20 exam-style questions to help Year 2 students practise adding two-digit numbers with regrouping. These questions follow the Key Stage 1 curriculum and increase in difficulty to build confidence and skill.

Questions ❓

  1. 27 + 35 =
  2. 48 + 16 =
  3. 59 + 24 =
  4. 36 + 47 =
  5. 65 + 28 =
  6. 72 + 19 =
  7. 44 + 38 =
  8. 53 + 29 =
  9. 67 + 14 =
  10. 81 + 27 =
  11. 49 + 55 =
  12. 38 + 46 =
  13. 74 + 28 =
  14. 62 + 39 =
  15. 85 + 17 =
  16. 56 + 49 =
  17. 93 + 18 =
  18. 47 + 56 =
  19. 69 + 37 =
  20. 78 + 45 =

Answers ✅

  1. 27 + 35 = 62
    (7 + 5 = 12, carry 1; 2 + 3 + 1 = 6)
  2. 48 + 16 = 64
    (8 + 6 = 14, carry 1; 4 + 1 + 1 = 6)
  3. 59 + 24 = 83
    (9 + 4 = 13, carry 1; 5 + 2 + 1 = 8)
  4. 36 + 47 = 83
    (6 + 7 = 13, carry 1; 3 + 4 + 1 = 8)
  5. 65 + 28 = 93
    (5 + 8 = 13, carry 1; 6 + 2 + 1 = 9)
  6. 72 + 19 = 91
    (2 + 9 = 11, carry 1; 7 + 1 + 1 = 9)
  7. 44 + 38 = 82
    (4 + 8 = 12, carry 1; 4 + 3 + 1 = 8)
  8. 53 + 29 = 82
    (3 + 9 = 12, carry 1; 5 + 2 + 1 = 8)
  9. 67 + 14 = 81
    (7 + 4 = 11, carry 1; 6 + 1 + 1 = 8)
  10. 81 + 27 = 108
    (1 + 7 = 8; 8 + 2 = 10, carry 1; write 0, carry 1 gives 108)
  11. 49 + 55 = 104
    (9 + 5 = 14, carry 1; 4 + 5 + 1 = 10, so 104)
  12. 38 + 46 = 84
    (8 + 6 = 14, carry 1; 3 + 4 + 1 = 8)
  13. 74 + 28 = 102
    (4 + 8 = 12, carry 1; 7 + 2 + 1 = 10, so 102)
  14. 62 + 39 = 101
    (2 + 9 = 11, carry 1; 6 + 3 + 1 = 10, so 101)
  15. 85 + 17 = 102
    (5 + 7 = 12, carry 1; 8 + 1 + 1 = 10, so 102)
  16. 56 + 49 = 105
    (6 + 9 = 15, carry 1; 5 + 4 + 1 = 10, so 105)
  17. 93 + 18 = 111
    (3 + 8 = 11, carry 1; 9 + 1 + 1 = 11, so 111)
  18. 47 + 56 = 103
    (7 + 6 = 13, carry 1; 4 + 5 + 1 = 10, so 103)
  19. 69 + 37 = 106
    (9 + 7 = 16, carry 1; 6 + 3 + 1 = 10, so 106)
  20. 78 + 45 = 123
    (8 + 5 = 13, carry 1; 7 + 4 + 1 = 12, so 123)

Study Tips 📚✨

  • Remember to add the ones first and carry over when the total is more than 9.
  • Write the carried number above the tens column to help you add it in the next step.
  • Always check your answers by adding the numbers again or using objects to count.
  • Practice these questions slowly and carefully to build your confidence!

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