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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 105 · 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. 1.66 + 36 =
  2. 2.57 + 14 =
  3. 3.26 + 38 =
  4. 4.46 + 82 =
  5. 5.25 + 17 =
  6. 6.46 + 59 =
  7. 7.87 + 14 =
  8. 8.81 + 32 =
  9. 9.33 + 53 =
  10. 10.89 + 81 =
  11. 11.33 + 16 =
  12. 12.35 + 22 =
  13. 13.22 + 82 =
  14. 14.24 + 74 =
  15. 15.82 + 81 =
  16. 16.34 + 72 =
  17. 17.73 + 59 =
  18. 18.58 + 21 =
  19. 19.59 + 22 =
  20. 20.38 + 16 =
  21. 21.60 + 14 =
  22. 22.82 + 47 =
  23. 23.21 + 88 =
  24. 24.51 + 39 =
  25. 25.60 + 73 =
  26. 26.57 + 48 =
  27. 27.26 + 17 =
  28. 28.35 + 78 =
  29. 29.26 + 25 =
  30. 30.38 + 13 =
  31. 31.65 + 54 =
  32. 32.50 + 42 =
  33. 33.61 + 15 =
  34. 34.22 + 62 =
  35. 35.39 + 84 =
  36. 36.48 + 17 =
  37. 37.87 + 35 =
  38. 38.27 + 55 =
  39. 39.68 + 14 =
  40. 40.30 + 71 =

Answer key

  1. 102
  2. 71
  3. 64
  4. 128
  5. 42
  6. 105
  7. 101
  8. 113
  9. 86
  10. 170
  11. 49
  12. 57
  13. 104
  14. 98
  15. 163
  16. 106
  17. 132
  18. 79
  19. 81
  20. 54
  21. 74
  22. 129
  23. 109
  24. 90
  25. 133
  26. 105
  27. 43
  28. 113
  29. 51
  30. 51
  31. 119
  32. 92
  33. 76
  34. 84
  35. 123
  36. 65
  37. 122
  38. 82
  39. 82
  40. 101

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