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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 512 · 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. 1.84 + 23 =
  2. 2.40 + 57 =
  3. 3.30 + 22 =
  4. 4.22 + 74 =
  5. 5.55 + 75 =
  6. 6.55 + 87 =
  7. 7.27 + 34 =
  8. 8.23 + 67 =
  9. 9.63 + 69 =
  10. 10.64 + 71 =
  11. 11.74 + 76 =
  12. 12.30 + 28 =
  13. 13.70 + 51 =
  14. 14.47 + 77 =
  15. 15.77 + 27 =
  16. 16.49 + 12 =
  17. 17.42 + 89 =
  18. 18.37 + 18 =
  19. 19.73 + 38 =
  20. 20.48 + 14 =
  21. 21.53 + 84 =
  22. 22.41 + 19 =
  23. 23.62 + 38 =
  24. 24.63 + 31 =
  25. 25.37 + 56 =
  26. 26.34 + 56 =
  27. 27.56 + 56 =
  28. 28.22 + 27 =
  29. 29.81 + 41 =
  30. 30.55 + 14 =
  31. 31.22 + 17 =
  32. 32.86 + 55 =
  33. 33.23 + 76 =
  34. 34.68 + 62 =
  35. 35.45 + 17 =
  36. 36.69 + 24 =
  37. 37.64 + 26 =
  38. 38.48 + 57 =
  39. 39.76 + 19 =
  40. 40.30 + 85 =

Answer key

  1. 107
  2. 97
  3. 52
  4. 96
  5. 130
  6. 142
  7. 61
  8. 90
  9. 132
  10. 135
  11. 150
  12. 58
  13. 121
  14. 124
  15. 104
  16. 61
  17. 131
  18. 55
  19. 111
  20. 62
  21. 137
  22. 60
  23. 100
  24. 94
  25. 93
  26. 90
  27. 112
  28. 49
  29. 122
  30. 69
  31. 39
  32. 141
  33. 99
  34. 130
  35. 62
  36. 93
  37. 90
  38. 105
  39. 95
  40. 115

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