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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 526 · 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 + 23 =
  2. 2.75 + 36 =
  3. 3.25 + 34 =
  4. 4.23 + 31 =
  5. 5.62 + 19 =
  6. 6.43 + 67 =
  7. 7.39 + 88 =
  8. 8.70 + 72 =
  9. 9.64 + 45 =
  10. 10.24 + 65 =
  11. 11.32 + 76 =
  12. 12.78 + 31 =
  13. 13.82 + 14 =
  14. 14.57 + 27 =
  15. 15.40 + 56 =
  16. 16.32 + 65 =
  17. 17.58 + 41 =
  18. 18.38 + 55 =
  19. 19.58 + 69 =
  20. 20.50 + 76 =
  21. 21.41 + 43 =
  22. 22.49 + 74 =
  23. 23.26 + 29 =
  24. 24.81 + 44 =
  25. 25.40 + 29 =
  26. 26.69 + 88 =
  27. 27.77 + 78 =
  28. 28.65 + 81 =
  29. 29.52 + 22 =
  30. 30.83 + 44 =
  31. 31.62 + 82 =
  32. 32.61 + 54 =
  33. 33.67 + 65 =
  34. 34.57 + 46 =
  35. 35.50 + 81 =
  36. 36.64 + 74 =
  37. 37.26 + 58 =
  38. 38.23 + 67 =
  39. 39.70 + 49 =
  40. 40.51 + 41 =

Answer key

  1. 50
  2. 111
  3. 59
  4. 54
  5. 81
  6. 110
  7. 127
  8. 142
  9. 109
  10. 89
  11. 108
  12. 109
  13. 96
  14. 84
  15. 96
  16. 97
  17. 99
  18. 93
  19. 127
  20. 126
  21. 84
  22. 123
  23. 55
  24. 125
  25. 69
  26. 157
  27. 155
  28. 146
  29. 74
  30. 127
  31. 144
  32. 115
  33. 132
  34. 103
  35. 131
  36. 138
  37. 84
  38. 90
  39. 119
  40. 92

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