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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 289 · 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. 1.27 + 75 =
  2. 2.35 + 24 =
  3. 3.31 + 81 =
  4. 4.26 + 47 =
  5. 5.73 + 61 =
  6. 6.44 + 66 =
  7. 7.84 + 51 =
  8. 8.60 + 68 =
  9. 9.65 + 21 =
  10. 10.39 + 71 =
  11. 11.38 + 31 =
  12. 12.39 + 24 =
  13. 13.48 + 66 =
  14. 14.77 + 75 =
  15. 15.27 + 61 =
  16. 16.29 + 78 =
  17. 17.63 + 54 =
  18. 18.83 + 51 =
  19. 19.21 + 72 =
  20. 20.21 + 39 =
  21. 21.67 + 49 =
  22. 22.29 + 72 =
  23. 23.58 + 16 =
  24. 24.31 + 41 =
  25. 25.76 + 28 =
  26. 26.67 + 88 =
  27. 27.36 + 42 =
  28. 28.33 + 41 =
  29. 29.86 + 19 =
  30. 30.55 + 58 =
  31. 31.67 + 13 =
  32. 32.89 + 24 =
  33. 33.79 + 59 =
  34. 34.41 + 61 =
  35. 35.52 + 47 =
  36. 36.71 + 26 =
  37. 37.86 + 35 =
  38. 38.82 + 25 =
  39. 39.78 + 27 =
  40. 40.58 + 25 =

Answer key

  1. 102
  2. 59
  3. 112
  4. 73
  5. 134
  6. 110
  7. 135
  8. 128
  9. 86
  10. 110
  11. 69
  12. 63
  13. 114
  14. 152
  15. 88
  16. 107
  17. 117
  18. 134
  19. 93
  20. 60
  21. 116
  22. 101
  23. 74
  24. 72
  25. 104
  26. 155
  27. 78
  28. 74
  29. 105
  30. 113
  31. 80
  32. 113
  33. 138
  34. 102
  35. 99
  36. 97
  37. 121
  38. 107
  39. 105
  40. 83

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