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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 184 · 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. 1.32 + 24 =
  2. 2.81 + 59 =
  3. 3.77 + 16 =
  4. 4.41 + 45 =
  5. 5.65 + 37 =
  6. 6.75 + 35 =
  7. 7.26 + 73 =
  8. 8.60 + 27 =
  9. 9.39 + 23 =
  10. 10.68 + 15 =
  11. 11.49 + 12 =
  12. 12.89 + 62 =
  13. 13.49 + 47 =
  14. 14.29 + 12 =
  15. 15.68 + 36 =
  16. 16.83 + 13 =
  17. 17.73 + 29 =
  18. 18.24 + 61 =
  19. 19.89 + 85 =
  20. 20.39 + 29 =
  21. 21.89 + 28 =
  22. 22.44 + 36 =
  23. 23.56 + 57 =
  24. 24.53 + 16 =
  25. 25.33 + 56 =
  26. 26.31 + 85 =
  27. 27.21 + 81 =
  28. 28.62 + 37 =
  29. 29.41 + 18 =
  30. 30.68 + 74 =
  31. 31.72 + 74 =
  32. 32.30 + 49 =
  33. 33.81 + 43 =
  34. 34.84 + 39 =
  35. 35.81 + 84 =
  36. 36.51 + 87 =
  37. 37.68 + 78 =
  38. 38.47 + 51 =
  39. 39.32 + 75 =
  40. 40.36 + 19 =

Answer key

  1. 56
  2. 140
  3. 93
  4. 86
  5. 102
  6. 110
  7. 99
  8. 87
  9. 62
  10. 83
  11. 61
  12. 151
  13. 96
  14. 41
  15. 104
  16. 96
  17. 102
  18. 85
  19. 174
  20. 68
  21. 117
  22. 80
  23. 113
  24. 69
  25. 89
  26. 116
  27. 102
  28. 99
  29. 59
  30. 142
  31. 146
  32. 79
  33. 124
  34. 123
  35. 165
  36. 138
  37. 146
  38. 98
  39. 107
  40. 55

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