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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 68 · 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. 1.43 + 17 =
  2. 2.28 + 83 =
  3. 3.57 + 69 =
  4. 4.86 + 41 =
  5. 5.52 + 13 =
  6. 6.39 + 89 =
  7. 7.48 + 52 =
  8. 8.48 + 16 =
  9. 9.33 + 22 =
  10. 10.73 + 17 =
  11. 11.79 + 81 =
  12. 12.45 + 51 =
  13. 13.40 + 81 =
  14. 14.49 + 19 =
  15. 15.86 + 59 =
  16. 16.49 + 24 =
  17. 17.29 + 23 =
  18. 18.79 + 49 =
  19. 19.71 + 41 =
  20. 20.21 + 61 =
  21. 21.82 + 59 =
  22. 22.25 + 24 =
  23. 23.80 + 51 =
  24. 24.33 + 87 =
  25. 25.48 + 61 =
  26. 26.28 + 66 =
  27. 27.61 + 68 =
  28. 28.37 + 41 =
  29. 29.76 + 31 =
  30. 30.30 + 77 =
  31. 31.38 + 63 =
  32. 32.24 + 48 =
  33. 33.78 + 75 =
  34. 34.28 + 25 =
  35. 35.85 + 18 =
  36. 36.31 + 42 =
  37. 37.56 + 12 =
  38. 38.45 + 87 =
  39. 39.27 + 58 =
  40. 40.80 + 46 =

Answer key

  1. 60
  2. 111
  3. 126
  4. 127
  5. 65
  6. 128
  7. 100
  8. 64
  9. 55
  10. 90
  11. 160
  12. 96
  13. 121
  14. 68
  15. 145
  16. 73
  17. 52
  18. 128
  19. 112
  20. 82
  21. 141
  22. 49
  23. 131
  24. 120
  25. 109
  26. 94
  27. 129
  28. 78
  29. 107
  30. 107
  31. 101
  32. 72
  33. 153
  34. 53
  35. 103
  36. 73
  37. 68
  38. 132
  39. 85
  40. 126

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