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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 119 · 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. 1.67 + 57 =
  2. 2.23 + 18 =
  3. 3.60 + 15 =
  4. 4.78 + 47 =
  5. 5.86 + 45 =
  6. 6.40 + 44 =
  7. 7.47 + 14 =
  8. 8.48 + 77 =
  9. 9.55 + 19 =
  10. 10.65 + 22 =
  11. 11.68 + 29 =
  12. 12.30 + 49 =
  13. 13.84 + 81 =
  14. 14.74 + 15 =
  15. 15.79 + 13 =
  16. 16.28 + 21 =
  17. 17.80 + 81 =
  18. 18.78 + 35 =
  19. 19.69 + 73 =
  20. 20.38 + 51 =
  21. 21.54 + 46 =
  22. 22.56 + 69 =
  23. 23.76 + 49 =
  24. 24.89 + 53 =
  25. 25.44 + 81 =
  26. 26.84 + 22 =
  27. 27.29 + 36 =
  28. 28.51 + 24 =
  29. 29.31 + 48 =
  30. 30.43 + 41 =
  31. 31.83 + 68 =
  32. 32.28 + 76 =
  33. 33.71 + 64 =
  34. 34.32 + 37 =
  35. 35.86 + 17 =
  36. 36.65 + 51 =
  37. 37.69 + 71 =
  38. 38.59 + 61 =
  39. 39.25 + 54 =
  40. 40.40 + 21 =

Answer key

  1. 124
  2. 41
  3. 75
  4. 125
  5. 131
  6. 84
  7. 61
  8. 125
  9. 74
  10. 87
  11. 97
  12. 79
  13. 165
  14. 89
  15. 92
  16. 49
  17. 161
  18. 113
  19. 142
  20. 89
  21. 100
  22. 125
  23. 125
  24. 142
  25. 125
  26. 106
  27. 65
  28. 75
  29. 79
  30. 84
  31. 151
  32. 104
  33. 135
  34. 69
  35. 103
  36. 116
  37. 140
  38. 120
  39. 79
  40. 61

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