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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 112 · 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. 1.53 + 49 =
  2. 2.29 + 51 =
  3. 3.74 + 73 =
  4. 4.38 + 15 =
  5. 5.39 + 34 =
  6. 6.28 + 77 =
  7. 7.87 + 59 =
  8. 8.29 + 15 =
  9. 9.57 + 26 =
  10. 10.77 + 29 =
  11. 11.66 + 19 =
  12. 12.68 + 75 =
  13. 13.27 + 39 =
  14. 14.26 + 29 =
  15. 15.87 + 43 =
  16. 16.60 + 48 =
  17. 17.66 + 67 =
  18. 18.26 + 53 =
  19. 19.59 + 23 =
  20. 20.23 + 58 =
  21. 21.65 + 22 =
  22. 22.49 + 61 =
  23. 23.26 + 82 =
  24. 24.66 + 38 =
  25. 25.59 + 55 =
  26. 26.79 + 14 =
  27. 27.62 + 49 =
  28. 28.44 + 68 =
  29. 29.89 + 76 =
  30. 30.84 + 16 =
  31. 31.41 + 12 =
  32. 32.45 + 89 =
  33. 33.65 + 62 =
  34. 34.52 + 86 =
  35. 35.25 + 31 =
  36. 36.71 + 85 =
  37. 37.39 + 71 =
  38. 38.55 + 66 =
  39. 39.86 + 27 =
  40. 40.61 + 34 =

Answer key

  1. 102
  2. 80
  3. 147
  4. 53
  5. 73
  6. 105
  7. 146
  8. 44
  9. 83
  10. 106
  11. 85
  12. 143
  13. 66
  14. 55
  15. 130
  16. 108
  17. 133
  18. 79
  19. 82
  20. 81
  21. 87
  22. 110
  23. 108
  24. 104
  25. 114
  26. 93
  27. 111
  28. 112
  29. 165
  30. 100
  31. 53
  32. 134
  33. 127
  34. 138
  35. 56
  36. 156
  37. 110
  38. 121
  39. 113
  40. 95

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