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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 662 · 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. 1.21 + 75 =
  2. 2.44 + 23 =
  3. 3.78 + 29 =
  4. 4.57 + 53 =
  5. 5.21 + 12 =
  6. 6.40 + 71 =
  7. 7.74 + 81 =
  8. 8.64 + 48 =
  9. 9.27 + 49 =
  10. 10.70 + 74 =
  11. 11.23 + 32 =
  12. 12.33 + 12 =
  13. 13.44 + 85 =
  14. 14.86 + 33 =
  15. 15.33 + 22 =
  16. 16.64 + 82 =
  17. 17.66 + 72 =
  18. 18.37 + 21 =
  19. 19.73 + 51 =
  20. 20.42 + 41 =
  21. 21.86 + 31 =
  22. 22.62 + 51 =
  23. 23.28 + 54 =
  24. 24.39 + 76 =
  25. 25.77 + 82 =
  26. 26.61 + 51 =
  27. 27.87 + 29 =
  28. 28.72 + 24 =
  29. 29.61 + 37 =
  30. 30.61 + 78 =
  31. 31.30 + 57 =
  32. 32.80 + 57 =
  33. 33.78 + 28 =
  34. 34.82 + 43 =
  35. 35.80 + 13 =
  36. 36.29 + 41 =
  37. 37.85 + 55 =
  38. 38.84 + 31 =
  39. 39.59 + 68 =
  40. 40.38 + 87 =

Answer key

  1. 96
  2. 67
  3. 107
  4. 110
  5. 33
  6. 111
  7. 155
  8. 112
  9. 76
  10. 144
  11. 55
  12. 45
  13. 129
  14. 119
  15. 55
  16. 146
  17. 138
  18. 58
  19. 124
  20. 83
  21. 117
  22. 113
  23. 82
  24. 115
  25. 159
  26. 112
  27. 116
  28. 96
  29. 98
  30. 139
  31. 87
  32. 137
  33. 106
  34. 125
  35. 93
  36. 70
  37. 140
  38. 115
  39. 127
  40. 125

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