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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 237 · 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. 1.77 + 59 =
  2. 2.60 + 71 =
  3. 3.55 + 22 =
  4. 4.60 + 86 =
  5. 5.60 + 21 =
  6. 6.78 + 31 =
  7. 7.38 + 41 =
  8. 8.83 + 81 =
  9. 9.38 + 37 =
  10. 10.26 + 15 =
  11. 11.86 + 88 =
  12. 12.82 + 89 =
  13. 13.82 + 73 =
  14. 14.36 + 69 =
  15. 15.77 + 47 =
  16. 16.76 + 56 =
  17. 17.79 + 69 =
  18. 18.61 + 21 =
  19. 19.87 + 41 =
  20. 20.28 + 12 =
  21. 21.72 + 31 =
  22. 22.62 + 19 =
  23. 23.42 + 15 =
  24. 24.46 + 81 =
  25. 25.33 + 16 =
  26. 26.21 + 48 =
  27. 27.85 + 78 =
  28. 28.35 + 81 =
  29. 29.47 + 45 =
  30. 30.23 + 56 =
  31. 31.38 + 71 =
  32. 32.30 + 64 =
  33. 33.63 + 84 =
  34. 34.63 + 83 =
  35. 35.65 + 52 =
  36. 36.43 + 78 =
  37. 37.87 + 53 =
  38. 38.26 + 59 =
  39. 39.72 + 41 =
  40. 40.88 + 65 =

Answer key

  1. 136
  2. 131
  3. 77
  4. 146
  5. 81
  6. 109
  7. 79
  8. 164
  9. 75
  10. 41
  11. 174
  12. 171
  13. 155
  14. 105
  15. 124
  16. 132
  17. 148
  18. 82
  19. 128
  20. 40
  21. 103
  22. 81
  23. 57
  24. 127
  25. 49
  26. 69
  27. 163
  28. 116
  29. 92
  30. 79
  31. 109
  32. 94
  33. 147
  34. 146
  35. 117
  36. 121
  37. 140
  38. 85
  39. 113
  40. 153

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