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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 627 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.22 + 36 =
  2. 2.31 + 58 =
  3. 3.67 + 16 =
  4. 4.83 + 18 =
  5. 5.30 + 42 =
  6. 6.38 + 83 =
  7. 7.75 + 72 =
  8. 8.36 + 31 =
  9. 9.77 + 77 =
  10. 10.52 + 51 =
  11. 11.57 + 66 =
  12. 12.72 + 41 =
  13. 13.36 + 22 =
  14. 14.42 + 73 =
  15. 15.38 + 52 =
  16. 16.59 + 84 =
  17. 17.87 + 18 =
  18. 18.31 + 25 =
  19. 19.54 + 83 =
  20. 20.77 + 16 =
  21. 21.62 + 15 =
  22. 22.21 + 15 =
  23. 23.85 + 19 =
  24. 24.82 + 17 =
  25. 25.61 + 49 =
  26. 26.86 + 82 =
  27. 27.21 + 26 =
  28. 28.33 + 29 =
  29. 29.82 + 23 =
  30. 30.41 + 79 =
  31. 31.75 + 35 =
  32. 32.87 + 41 =
  33. 33.69 + 48 =
  34. 34.81 + 58 =
  35. 35.68 + 63 =
  36. 36.48 + 34 =
  37. 37.34 + 62 =
  38. 38.35 + 25 =
  39. 39.68 + 52 =
  40. 40.24 + 81 =

Answer key

  1. 58
  2. 89
  3. 83
  4. 101
  5. 72
  6. 121
  7. 147
  8. 67
  9. 154
  10. 103
  11. 123
  12. 113
  13. 58
  14. 115
  15. 90
  16. 143
  17. 105
  18. 56
  19. 137
  20. 93
  21. 77
  22. 36
  23. 104
  24. 99
  25. 110
  26. 168
  27. 47
  28. 62
  29. 105
  30. 120
  31. 110
  32. 128
  33. 117
  34. 139
  35. 131
  36. 82
  37. 96
  38. 60
  39. 120
  40. 105

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