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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 69 · 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. 1.54 + 41 =
  2. 2.86 + 25 =
  3. 3.48 + 41 =
  4. 4.39 + 44 =
  5. 5.61 + 16 =
  6. 6.40 + 28 =
  7. 7.63 + 17 =
  8. 8.65 + 32 =
  9. 9.83 + 32 =
  10. 10.62 + 46 =
  11. 11.59 + 31 =
  12. 12.49 + 62 =
  13. 13.78 + 76 =
  14. 14.52 + 36 =
  15. 15.42 + 67 =
  16. 16.36 + 64 =
  17. 17.58 + 44 =
  18. 18.40 + 13 =
  19. 19.48 + 33 =
  20. 20.37 + 14 =
  21. 21.77 + 77 =
  22. 22.62 + 72 =
  23. 23.79 + 85 =
  24. 24.48 + 79 =
  25. 25.74 + 77 =
  26. 26.79 + 65 =
  27. 27.42 + 25 =
  28. 28.40 + 17 =
  29. 29.57 + 31 =
  30. 30.85 + 31 =
  31. 31.85 + 28 =
  32. 32.28 + 51 =
  33. 33.61 + 62 =
  34. 34.80 + 22 =
  35. 35.69 + 61 =
  36. 36.61 + 67 =
  37. 37.51 + 34 =
  38. 38.36 + 22 =
  39. 39.88 + 86 =
  40. 40.35 + 85 =

Answer key

  1. 95
  2. 111
  3. 89
  4. 83
  5. 77
  6. 68
  7. 80
  8. 97
  9. 115
  10. 108
  11. 90
  12. 111
  13. 154
  14. 88
  15. 109
  16. 100
  17. 102
  18. 53
  19. 81
  20. 51
  21. 154
  22. 134
  23. 164
  24. 127
  25. 151
  26. 144
  27. 67
  28. 57
  29. 88
  30. 116
  31. 113
  32. 79
  33. 123
  34. 102
  35. 130
  36. 128
  37. 85
  38. 58
  39. 174
  40. 120

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