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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 411 · 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. 1.66 + 26 =
  2. 2.62 + 62 =
  3. 3.68 + 53 =
  4. 4.50 + 83 =
  5. 5.37 + 75 =
  6. 6.82 + 49 =
  7. 7.31 + 21 =
  8. 8.42 + 53 =
  9. 9.40 + 35 =
  10. 10.51 + 21 =
  11. 11.57 + 67 =
  12. 12.86 + 74 =
  13. 13.66 + 53 =
  14. 14.62 + 49 =
  15. 15.66 + 81 =
  16. 16.69 + 31 =
  17. 17.36 + 66 =
  18. 18.75 + 21 =
  19. 19.34 + 57 =
  20. 20.81 + 54 =
  21. 21.61 + 37 =
  22. 22.39 + 82 =
  23. 23.69 + 83 =
  24. 24.55 + 36 =
  25. 25.72 + 63 =
  26. 26.22 + 29 =
  27. 27.58 + 19 =
  28. 28.43 + 52 =
  29. 29.58 + 65 =
  30. 30.71 + 16 =
  31. 31.75 + 61 =
  32. 32.88 + 78 =
  33. 33.26 + 21 =
  34. 34.45 + 68 =
  35. 35.23 + 73 =
  36. 36.84 + 49 =
  37. 37.27 + 78 =
  38. 38.89 + 86 =
  39. 39.77 + 57 =
  40. 40.71 + 51 =

Answer key

  1. 92
  2. 124
  3. 121
  4. 133
  5. 112
  6. 131
  7. 52
  8. 95
  9. 75
  10. 72
  11. 124
  12. 160
  13. 119
  14. 111
  15. 147
  16. 100
  17. 102
  18. 96
  19. 91
  20. 135
  21. 98
  22. 121
  23. 152
  24. 91
  25. 135
  26. 51
  27. 77
  28. 95
  29. 123
  30. 87
  31. 136
  32. 166
  33. 47
  34. 113
  35. 96
  36. 133
  37. 105
  38. 175
  39. 134
  40. 122

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