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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 558 · 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. 1.30 + 22 =
  2. 2.29 + 76 =
  3. 3.34 + 85 =
  4. 4.58 + 46 =
  5. 5.21 + 79 =
  6. 6.87 + 15 =
  7. 7.47 + 51 =
  8. 8.57 + 22 =
  9. 9.39 + 48 =
  10. 10.36 + 81 =
  11. 11.51 + 61 =
  12. 12.45 + 43 =
  13. 13.63 + 52 =
  14. 14.81 + 64 =
  15. 15.56 + 85 =
  16. 16.38 + 31 =
  17. 17.88 + 43 =
  18. 18.30 + 15 =
  19. 19.48 + 29 =
  20. 20.39 + 12 =
  21. 21.32 + 29 =
  22. 22.85 + 85 =
  23. 23.81 + 35 =
  24. 24.89 + 72 =
  25. 25.37 + 41 =
  26. 26.86 + 31 =
  27. 27.25 + 41 =
  28. 28.83 + 31 =
  29. 29.32 + 21 =
  30. 30.28 + 47 =
  31. 31.41 + 32 =
  32. 32.79 + 52 =
  33. 33.55 + 89 =
  34. 34.43 + 28 =
  35. 35.86 + 28 =
  36. 36.32 + 71 =
  37. 37.25 + 64 =
  38. 38.22 + 66 =
  39. 39.33 + 31 =
  40. 40.27 + 51 =

Answer key

  1. 52
  2. 105
  3. 119
  4. 104
  5. 100
  6. 102
  7. 98
  8. 79
  9. 87
  10. 117
  11. 112
  12. 88
  13. 115
  14. 145
  15. 141
  16. 69
  17. 131
  18. 45
  19. 77
  20. 51
  21. 61
  22. 170
  23. 116
  24. 161
  25. 78
  26. 117
  27. 66
  28. 114
  29. 53
  30. 75
  31. 73
  32. 131
  33. 144
  34. 71
  35. 114
  36. 103
  37. 89
  38. 88
  39. 64
  40. 78

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