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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 675 · 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. 1.41 + 37 =
  2. 2.52 + 67 =
  3. 3.66 + 27 =
  4. 4.89 + 32 =
  5. 5.33 + 59 =
  6. 6.26 + 34 =
  7. 7.72 + 29 =
  8. 8.87 + 78 =
  9. 9.55 + 84 =
  10. 10.33 + 18 =
  11. 11.25 + 21 =
  12. 12.42 + 51 =
  13. 13.88 + 13 =
  14. 14.60 + 57 =
  15. 15.29 + 31 =
  16. 16.78 + 18 =
  17. 17.36 + 31 =
  18. 18.77 + 45 =
  19. 19.67 + 12 =
  20. 20.81 + 37 =
  21. 21.73 + 19 =
  22. 22.86 + 29 =
  23. 23.21 + 21 =
  24. 24.29 + 35 =
  25. 25.24 + 86 =
  26. 26.77 + 55 =
  27. 27.60 + 17 =
  28. 28.70 + 13 =
  29. 29.26 + 27 =
  30. 30.82 + 21 =
  31. 31.87 + 41 =
  32. 32.85 + 31 =
  33. 33.81 + 23 =
  34. 34.88 + 81 =
  35. 35.82 + 39 =
  36. 36.22 + 31 =
  37. 37.21 + 89 =
  38. 38.83 + 38 =
  39. 39.33 + 64 =
  40. 40.32 + 27 =

Answer key

  1. 78
  2. 119
  3. 93
  4. 121
  5. 92
  6. 60
  7. 101
  8. 165
  9. 139
  10. 51
  11. 46
  12. 93
  13. 101
  14. 117
  15. 60
  16. 96
  17. 67
  18. 122
  19. 79
  20. 118
  21. 92
  22. 115
  23. 42
  24. 64
  25. 110
  26. 132
  27. 77
  28. 83
  29. 53
  30. 103
  31. 128
  32. 116
  33. 104
  34. 169
  35. 121
  36. 53
  37. 110
  38. 121
  39. 97
  40. 59

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