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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 318 · 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. 1.22 + 48 =
  2. 2.75 + 12 =
  3. 3.32 + 21 =
  4. 4.33 + 25 =
  5. 5.66 + 75 =
  6. 6.58 + 49 =
  7. 7.50 + 76 =
  8. 8.57 + 31 =
  9. 9.27 + 44 =
  10. 10.78 + 34 =
  11. 11.72 + 33 =
  12. 12.60 + 39 =
  13. 13.67 + 17 =
  14. 14.75 + 26 =
  15. 15.29 + 49 =
  16. 16.56 + 33 =
  17. 17.45 + 34 =
  18. 18.70 + 59 =
  19. 19.61 + 14 =
  20. 20.61 + 55 =
  21. 21.46 + 57 =
  22. 22.26 + 41 =
  23. 23.31 + 44 =
  24. 24.43 + 56 =
  25. 25.58 + 47 =
  26. 26.65 + 82 =
  27. 27.38 + 31 =
  28. 28.58 + 31 =
  29. 29.23 + 18 =
  30. 30.66 + 63 =
  31. 31.50 + 61 =
  32. 32.87 + 15 =
  33. 33.64 + 12 =
  34. 34.21 + 73 =
  35. 35.86 + 75 =
  36. 36.36 + 41 =
  37. 37.28 + 77 =
  38. 38.82 + 81 =
  39. 39.56 + 19 =
  40. 40.42 + 22 =

Answer key

  1. 70
  2. 87
  3. 53
  4. 58
  5. 141
  6. 107
  7. 126
  8. 88
  9. 71
  10. 112
  11. 105
  12. 99
  13. 84
  14. 101
  15. 78
  16. 89
  17. 79
  18. 129
  19. 75
  20. 116
  21. 103
  22. 67
  23. 75
  24. 99
  25. 105
  26. 147
  27. 69
  28. 89
  29. 41
  30. 129
  31. 111
  32. 102
  33. 76
  34. 94
  35. 161
  36. 77
  37. 105
  38. 163
  39. 75
  40. 64

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