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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 718 · 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. 1.74 + 25 =
  2. 2.47 + 21 =
  3. 3.39 + 25 =
  4. 4.22 + 33 =
  5. 5.46 + 41 =
  6. 6.55 + 65 =
  7. 7.50 + 38 =
  8. 8.85 + 52 =
  9. 9.29 + 28 =
  10. 10.64 + 38 =
  11. 11.79 + 33 =
  12. 12.83 + 65 =
  13. 13.30 + 55 =
  14. 14.74 + 17 =
  15. 15.48 + 42 =
  16. 16.70 + 26 =
  17. 17.66 + 73 =
  18. 18.53 + 71 =
  19. 19.44 + 75 =
  20. 20.29 + 71 =
  21. 21.86 + 77 =
  22. 22.52 + 42 =
  23. 23.56 + 61 =
  24. 24.57 + 76 =
  25. 25.57 + 89 =
  26. 26.40 + 34 =
  27. 27.75 + 84 =
  28. 28.21 + 81 =
  29. 29.65 + 81 =
  30. 30.41 + 14 =
  31. 31.39 + 19 =
  32. 32.67 + 41 =
  33. 33.39 + 31 =
  34. 34.42 + 89 =
  35. 35.64 + 57 =
  36. 36.58 + 36 =
  37. 37.30 + 73 =
  38. 38.36 + 33 =
  39. 39.76 + 63 =
  40. 40.53 + 37 =

Answer key

  1. 99
  2. 68
  3. 64
  4. 55
  5. 87
  6. 120
  7. 88
  8. 137
  9. 57
  10. 102
  11. 112
  12. 148
  13. 85
  14. 91
  15. 90
  16. 96
  17. 139
  18. 124
  19. 119
  20. 100
  21. 163
  22. 94
  23. 117
  24. 133
  25. 146
  26. 74
  27. 159
  28. 102
  29. 146
  30. 55
  31. 58
  32. 108
  33. 70
  34. 131
  35. 121
  36. 94
  37. 103
  38. 69
  39. 139
  40. 90

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