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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 335 · 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. 1.21 + 44 =
  2. 2.81 + 65 =
  3. 3.45 + 39 =
  4. 4.40 + 13 =
  5. 5.67 + 18 =
  6. 6.79 + 21 =
  7. 7.42 + 25 =
  8. 8.54 + 47 =
  9. 9.76 + 68 =
  10. 10.85 + 48 =
  11. 11.82 + 48 =
  12. 12.33 + 27 =
  13. 13.52 + 89 =
  14. 14.21 + 17 =
  15. 15.42 + 18 =
  16. 16.67 + 43 =
  17. 17.61 + 34 =
  18. 18.45 + 12 =
  19. 19.65 + 14 =
  20. 20.89 + 41 =
  21. 21.71 + 31 =
  22. 22.73 + 13 =
  23. 23.33 + 69 =
  24. 24.43 + 39 =
  25. 25.33 + 25 =
  26. 26.81 + 57 =
  27. 27.73 + 89 =
  28. 28.68 + 83 =
  29. 29.32 + 26 =
  30. 30.38 + 28 =
  31. 31.28 + 27 =
  32. 32.89 + 49 =
  33. 33.50 + 19 =
  34. 34.31 + 14 =
  35. 35.62 + 85 =
  36. 36.67 + 49 =
  37. 37.84 + 74 =
  38. 38.53 + 56 =
  39. 39.74 + 58 =
  40. 40.33 + 81 =

Answer key

  1. 65
  2. 146
  3. 84
  4. 53
  5. 85
  6. 100
  7. 67
  8. 101
  9. 144
  10. 133
  11. 130
  12. 60
  13. 141
  14. 38
  15. 60
  16. 110
  17. 95
  18. 57
  19. 79
  20. 130
  21. 102
  22. 86
  23. 102
  24. 82
  25. 58
  26. 138
  27. 162
  28. 151
  29. 58
  30. 66
  31. 55
  32. 138
  33. 69
  34. 45
  35. 147
  36. 116
  37. 158
  38. 109
  39. 132
  40. 114

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