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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 26 · 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. 1.30 + 53 =
  2. 2.41 + 14 =
  3. 3.25 + 54 =
  4. 4.63 + 64 =
  5. 5.89 + 76 =
  6. 6.80 + 59 =
  7. 7.65 + 41 =
  8. 8.42 + 81 =
  9. 9.59 + 36 =
  10. 10.61 + 31 =
  11. 11.51 + 76 =
  12. 12.57 + 21 =
  13. 13.64 + 69 =
  14. 14.58 + 87 =
  15. 15.65 + 19 =
  16. 16.30 + 36 =
  17. 17.28 + 25 =
  18. 18.41 + 47 =
  19. 19.45 + 88 =
  20. 20.24 + 31 =
  21. 21.35 + 15 =
  22. 22.26 + 46 =
  23. 23.35 + 31 =
  24. 24.76 + 61 =
  25. 25.33 + 89 =
  26. 26.21 + 35 =
  27. 27.35 + 69 =
  28. 28.80 + 16 =
  29. 29.49 + 53 =
  30. 30.71 + 68 =
  31. 31.83 + 42 =
  32. 32.73 + 86 =
  33. 33.84 + 38 =
  34. 34.54 + 22 =
  35. 35.48 + 29 =
  36. 36.67 + 16 =
  37. 37.62 + 79 =
  38. 38.24 + 81 =
  39. 39.21 + 17 =
  40. 40.68 + 24 =

Answer key

  1. 83
  2. 55
  3. 79
  4. 127
  5. 165
  6. 139
  7. 106
  8. 123
  9. 95
  10. 92
  11. 127
  12. 78
  13. 133
  14. 145
  15. 84
  16. 66
  17. 53
  18. 88
  19. 133
  20. 55
  21. 50
  22. 72
  23. 66
  24. 137
  25. 122
  26. 56
  27. 104
  28. 96
  29. 102
  30. 139
  31. 125
  32. 159
  33. 122
  34. 76
  35. 77
  36. 83
  37. 141
  38. 105
  39. 38
  40. 92

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