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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 361 · 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. 1.31 + 65 =
  2. 2.55 + 21 =
  3. 3.57 + 28 =
  4. 4.62 + 43 =
  5. 5.56 + 26 =
  6. 6.44 + 49 =
  7. 7.87 + 45 =
  8. 8.63 + 45 =
  9. 9.59 + 49 =
  10. 10.64 + 67 =
  11. 11.47 + 89 =
  12. 12.40 + 42 =
  13. 13.66 + 26 =
  14. 14.75 + 89 =
  15. 15.61 + 21 =
  16. 16.44 + 16 =
  17. 17.25 + 31 =
  18. 18.60 + 87 =
  19. 19.76 + 13 =
  20. 20.22 + 63 =
  21. 21.32 + 53 =
  22. 22.29 + 76 =
  23. 23.33 + 32 =
  24. 24.55 + 79 =
  25. 25.79 + 13 =
  26. 26.25 + 77 =
  27. 27.89 + 44 =
  28. 28.73 + 68 =
  29. 29.55 + 81 =
  30. 30.53 + 45 =
  31. 31.41 + 44 =
  32. 32.65 + 43 =
  33. 33.30 + 39 =
  34. 34.80 + 41 =
  35. 35.60 + 65 =
  36. 36.39 + 75 =
  37. 37.28 + 31 =
  38. 38.55 + 47 =
  39. 39.72 + 76 =
  40. 40.25 + 51 =

Answer key

  1. 96
  2. 76
  3. 85
  4. 105
  5. 82
  6. 93
  7. 132
  8. 108
  9. 108
  10. 131
  11. 136
  12. 82
  13. 92
  14. 164
  15. 82
  16. 60
  17. 56
  18. 147
  19. 89
  20. 85
  21. 85
  22. 105
  23. 65
  24. 134
  25. 92
  26. 102
  27. 133
  28. 141
  29. 136
  30. 98
  31. 85
  32. 108
  33. 69
  34. 121
  35. 125
  36. 114
  37. 59
  38. 102
  39. 148
  40. 76

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