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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 835 · 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. 1.87 + 36 =
  2. 2.84 + 23 =
  3. 3.39 + 15 =
  4. 4.35 + 28 =
  5. 5.39 + 66 =
  6. 6.59 + 87 =
  7. 7.89 + 19 =
  8. 8.49 + 54 =
  9. 9.41 + 21 =
  10. 10.73 + 82 =
  11. 11.81 + 34 =
  12. 12.67 + 55 =
  13. 13.27 + 34 =
  14. 14.72 + 38 =
  15. 15.81 + 44 =
  16. 16.25 + 51 =
  17. 17.69 + 58 =
  18. 18.23 + 34 =
  19. 19.59 + 65 =
  20. 20.63 + 33 =
  21. 21.75 + 82 =
  22. 22.30 + 12 =
  23. 23.89 + 33 =
  24. 24.25 + 45 =
  25. 25.64 + 57 =
  26. 26.39 + 28 =
  27. 27.78 + 72 =
  28. 28.70 + 15 =
  29. 29.65 + 54 =
  30. 30.69 + 62 =
  31. 31.43 + 52 =
  32. 32.86 + 71 =
  33. 33.83 + 31 =
  34. 34.31 + 49 =
  35. 35.37 + 24 =
  36. 36.21 + 58 =
  37. 37.37 + 58 =
  38. 38.77 + 89 =
  39. 39.21 + 35 =
  40. 40.60 + 19 =

Answer key

  1. 123
  2. 107
  3. 54
  4. 63
  5. 105
  6. 146
  7. 108
  8. 103
  9. 62
  10. 155
  11. 115
  12. 122
  13. 61
  14. 110
  15. 125
  16. 76
  17. 127
  18. 57
  19. 124
  20. 96
  21. 157
  22. 42
  23. 122
  24. 70
  25. 121
  26. 67
  27. 150
  28. 85
  29. 119
  30. 131
  31. 95
  32. 157
  33. 114
  34. 80
  35. 61
  36. 79
  37. 95
  38. 166
  39. 56
  40. 79

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