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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 401 · 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. 1.40 + 26 =
  2. 2.26 + 43 =
  3. 3.67 + 27 =
  4. 4.79 + 49 =
  5. 5.36 + 31 =
  6. 6.21 + 76 =
  7. 7.86 + 18 =
  8. 8.22 + 35 =
  9. 9.83 + 73 =
  10. 10.24 + 46 =
  11. 11.86 + 29 =
  12. 12.48 + 33 =
  13. 13.40 + 61 =
  14. 14.74 + 86 =
  15. 15.78 + 27 =
  16. 16.72 + 22 =
  17. 17.85 + 61 =
  18. 18.23 + 46 =
  19. 19.36 + 16 =
  20. 20.84 + 39 =
  21. 21.34 + 22 =
  22. 22.80 + 18 =
  23. 23.54 + 39 =
  24. 24.81 + 21 =
  25. 25.84 + 86 =
  26. 26.41 + 52 =
  27. 27.84 + 78 =
  28. 28.56 + 41 =
  29. 29.61 + 61 =
  30. 30.38 + 65 =
  31. 31.87 + 37 =
  32. 32.41 + 36 =
  33. 33.77 + 28 =
  34. 34.29 + 45 =
  35. 35.40 + 37 =
  36. 36.31 + 83 =
  37. 37.33 + 33 =
  38. 38.54 + 67 =
  39. 39.28 + 62 =
  40. 40.27 + 49 =

Answer key

  1. 66
  2. 69
  3. 94
  4. 128
  5. 67
  6. 97
  7. 104
  8. 57
  9. 156
  10. 70
  11. 115
  12. 81
  13. 101
  14. 160
  15. 105
  16. 94
  17. 146
  18. 69
  19. 52
  20. 123
  21. 56
  22. 98
  23. 93
  24. 102
  25. 170
  26. 93
  27. 162
  28. 97
  29. 122
  30. 103
  31. 124
  32. 77
  33. 105
  34. 74
  35. 77
  36. 114
  37. 66
  38. 121
  39. 90
  40. 76

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