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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 430 · 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. 1.64 + 24 =
  2. 2.42 + 41 =
  3. 3.24 + 32 =
  4. 4.57 + 89 =
  5. 5.85 + 28 =
  6. 6.72 + 55 =
  7. 7.82 + 52 =
  8. 8.59 + 55 =
  9. 9.71 + 65 =
  10. 10.50 + 16 =
  11. 11.47 + 83 =
  12. 12.45 + 88 =
  13. 13.72 + 66 =
  14. 14.49 + 44 =
  15. 15.23 + 54 =
  16. 16.52 + 63 =
  17. 17.61 + 89 =
  18. 18.46 + 61 =
  19. 19.88 + 29 =
  20. 20.71 + 18 =
  21. 21.24 + 31 =
  22. 22.41 + 65 =
  23. 23.53 + 48 =
  24. 24.81 + 19 =
  25. 25.56 + 38 =
  26. 26.36 + 16 =
  27. 27.35 + 76 =
  28. 28.33 + 29 =
  29. 29.65 + 86 =
  30. 30.68 + 21 =
  31. 31.25 + 62 =
  32. 32.89 + 19 =
  33. 33.34 + 51 =
  34. 34.89 + 49 =
  35. 35.58 + 24 =
  36. 36.45 + 77 =
  37. 37.70 + 27 =
  38. 38.65 + 19 =
  39. 39.31 + 53 =
  40. 40.59 + 41 =

Answer key

  1. 88
  2. 83
  3. 56
  4. 146
  5. 113
  6. 127
  7. 134
  8. 114
  9. 136
  10. 66
  11. 130
  12. 133
  13. 138
  14. 93
  15. 77
  16. 115
  17. 150
  18. 107
  19. 117
  20. 89
  21. 55
  22. 106
  23. 101
  24. 100
  25. 94
  26. 52
  27. 111
  28. 62
  29. 151
  30. 89
  31. 87
  32. 108
  33. 85
  34. 138
  35. 82
  36. 122
  37. 97
  38. 84
  39. 84
  40. 100

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