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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 749 · 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. 1.60 + 38 =
  2. 2.74 + 12 =
  3. 3.39 + 43 =
  4. 4.79 + 21 =
  5. 5.70 + 77 =
  6. 6.35 + 36 =
  7. 7.72 + 39 =
  8. 8.25 + 14 =
  9. 9.76 + 31 =
  10. 10.58 + 32 =
  11. 11.29 + 76 =
  12. 12.71 + 82 =
  13. 13.24 + 21 =
  14. 14.87 + 62 =
  15. 15.77 + 31 =
  16. 16.85 + 42 =
  17. 17.26 + 32 =
  18. 18.36 + 63 =
  19. 19.71 + 51 =
  20. 20.78 + 33 =
  21. 21.85 + 34 =
  22. 22.45 + 84 =
  23. 23.40 + 76 =
  24. 24.49 + 61 =
  25. 25.35 + 53 =
  26. 26.26 + 52 =
  27. 27.28 + 26 =
  28. 28.54 + 77 =
  29. 29.23 + 39 =
  30. 30.45 + 82 =
  31. 31.31 + 27 =
  32. 32.39 + 81 =
  33. 33.60 + 61 =
  34. 34.69 + 39 =
  35. 35.58 + 75 =
  36. 36.47 + 37 =
  37. 37.38 + 87 =
  38. 38.48 + 36 =
  39. 39.74 + 34 =
  40. 40.73 + 55 =

Answer key

  1. 98
  2. 86
  3. 82
  4. 100
  5. 147
  6. 71
  7. 111
  8. 39
  9. 107
  10. 90
  11. 105
  12. 153
  13. 45
  14. 149
  15. 108
  16. 127
  17. 58
  18. 99
  19. 122
  20. 111
  21. 119
  22. 129
  23. 116
  24. 110
  25. 88
  26. 78
  27. 54
  28. 131
  29. 62
  30. 127
  31. 58
  32. 120
  33. 121
  34. 108
  35. 133
  36. 84
  37. 125
  38. 84
  39. 108
  40. 128

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