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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 122 · 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. 1.54 + 55 =
  2. 2.49 + 78 =
  3. 3.75 + 24 =
  4. 4.80 + 64 =
  5. 5.26 + 31 =
  6. 6.44 + 61 =
  7. 7.49 + 49 =
  8. 8.27 + 17 =
  9. 9.62 + 15 =
  10. 10.87 + 88 =
  11. 11.79 + 88 =
  12. 12.68 + 23 =
  13. 13.35 + 66 =
  14. 14.43 + 47 =
  15. 15.68 + 55 =
  16. 16.64 + 31 =
  17. 17.52 + 37 =
  18. 18.31 + 27 =
  19. 19.39 + 65 =
  20. 20.40 + 21 =
  21. 21.69 + 44 =
  22. 22.57 + 88 =
  23. 23.67 + 31 =
  24. 24.49 + 35 =
  25. 25.42 + 28 =
  26. 26.72 + 81 =
  27. 27.44 + 65 =
  28. 28.28 + 69 =
  29. 29.31 + 26 =
  30. 30.36 + 66 =
  31. 31.53 + 55 =
  32. 32.49 + 68 =
  33. 33.23 + 64 =
  34. 34.75 + 78 =
  35. 35.30 + 26 =
  36. 36.85 + 56 =
  37. 37.56 + 62 =
  38. 38.34 + 84 =
  39. 39.35 + 88 =
  40. 40.73 + 79 =

Answer key

  1. 109
  2. 127
  3. 99
  4. 144
  5. 57
  6. 105
  7. 98
  8. 44
  9. 77
  10. 175
  11. 167
  12. 91
  13. 101
  14. 90
  15. 123
  16. 95
  17. 89
  18. 58
  19. 104
  20. 61
  21. 113
  22. 145
  23. 98
  24. 84
  25. 70
  26. 153
  27. 109
  28. 97
  29. 57
  30. 102
  31. 108
  32. 117
  33. 87
  34. 153
  35. 56
  36. 141
  37. 118
  38. 118
  39. 123
  40. 152

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