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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 134 · 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. 1.48 + 57 =
  2. 2.74 + 82 =
  3. 3.37 + 16 =
  4. 4.65 + 32 =
  5. 5.49 + 51 =
  6. 6.79 + 81 =
  7. 7.55 + 24 =
  8. 8.67 + 32 =
  9. 9.68 + 25 =
  10. 10.22 + 21 =
  11. 11.72 + 75 =
  12. 12.36 + 19 =
  13. 13.43 + 78 =
  14. 14.30 + 24 =
  15. 15.74 + 52 =
  16. 16.74 + 54 =
  17. 17.50 + 33 =
  18. 18.78 + 39 =
  19. 19.29 + 53 =
  20. 20.67 + 13 =
  21. 21.40 + 31 =
  22. 22.84 + 89 =
  23. 23.70 + 49 =
  24. 24.87 + 38 =
  25. 25.37 + 36 =
  26. 26.57 + 16 =
  27. 27.55 + 21 =
  28. 28.58 + 13 =
  29. 29.87 + 77 =
  30. 30.61 + 21 =
  31. 31.66 + 53 =
  32. 32.89 + 52 =
  33. 33.80 + 49 =
  34. 34.28 + 75 =
  35. 35.73 + 24 =
  36. 36.24 + 26 =
  37. 37.31 + 23 =
  38. 38.87 + 22 =
  39. 39.22 + 19 =
  40. 40.51 + 71 =

Answer key

  1. 105
  2. 156
  3. 53
  4. 97
  5. 100
  6. 160
  7. 79
  8. 99
  9. 93
  10. 43
  11. 147
  12. 55
  13. 121
  14. 54
  15. 126
  16. 128
  17. 83
  18. 117
  19. 82
  20. 80
  21. 71
  22. 173
  23. 119
  24. 125
  25. 73
  26. 73
  27. 76
  28. 71
  29. 164
  30. 82
  31. 119
  32. 141
  33. 129
  34. 103
  35. 97
  36. 50
  37. 54
  38. 109
  39. 41
  40. 122

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