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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 355 · 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. 1.23 + 83 =
  2. 2.83 + 69 =
  3. 3.35 + 83 =
  4. 4.63 + 44 =
  5. 5.22 + 17 =
  6. 6.29 + 65 =
  7. 7.37 + 57 =
  8. 8.60 + 79 =
  9. 9.21 + 43 =
  10. 10.74 + 86 =
  11. 11.78 + 82 =
  12. 12.53 + 17 =
  13. 13.25 + 71 =
  14. 14.32 + 73 =
  15. 15.35 + 43 =
  16. 16.63 + 23 =
  17. 17.49 + 23 =
  18. 18.25 + 37 =
  19. 19.25 + 16 =
  20. 20.21 + 26 =
  21. 21.85 + 74 =
  22. 22.50 + 71 =
  23. 23.39 + 77 =
  24. 24.44 + 46 =
  25. 25.86 + 25 =
  26. 26.82 + 55 =
  27. 27.76 + 29 =
  28. 28.71 + 42 =
  29. 29.81 + 66 =
  30. 30.55 + 84 =
  31. 31.66 + 47 =
  32. 32.51 + 63 =
  33. 33.39 + 86 =
  34. 34.42 + 13 =
  35. 35.37 + 48 =
  36. 36.77 + 33 =
  37. 37.38 + 65 =
  38. 38.70 + 12 =
  39. 39.47 + 27 =
  40. 40.88 + 21 =

Answer key

  1. 106
  2. 152
  3. 118
  4. 107
  5. 39
  6. 94
  7. 94
  8. 139
  9. 64
  10. 160
  11. 160
  12. 70
  13. 96
  14. 105
  15. 78
  16. 86
  17. 72
  18. 62
  19. 41
  20. 47
  21. 159
  22. 121
  23. 116
  24. 90
  25. 111
  26. 137
  27. 105
  28. 113
  29. 147
  30. 139
  31. 113
  32. 114
  33. 125
  34. 55
  35. 85
  36. 110
  37. 103
  38. 82
  39. 74
  40. 109

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