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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 87 · 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. 1.62 + 81 =
  2. 2.50 + 71 =
  3. 3.78 + 22 =
  4. 4.44 + 16 =
  5. 5.39 + 61 =
  6. 6.22 + 24 =
  7. 7.39 + 31 =
  8. 8.56 + 83 =
  9. 9.34 + 76 =
  10. 10.65 + 66 =
  11. 11.34 + 75 =
  12. 12.41 + 24 =
  13. 13.71 + 64 =
  14. 14.22 + 73 =
  15. 15.39 + 85 =
  16. 16.44 + 25 =
  17. 17.50 + 61 =
  18. 18.41 + 32 =
  19. 19.29 + 87 =
  20. 20.89 + 21 =
  21. 21.69 + 36 =
  22. 22.57 + 21 =
  23. 23.83 + 15 =
  24. 24.44 + 21 =
  25. 25.84 + 24 =
  26. 26.59 + 26 =
  27. 27.41 + 86 =
  28. 28.26 + 42 =
  29. 29.41 + 34 =
  30. 30.30 + 72 =
  31. 31.71 + 76 =
  32. 32.73 + 21 =
  33. 33.42 + 77 =
  34. 34.69 + 86 =
  35. 35.31 + 89 =
  36. 36.46 + 33 =
  37. 37.51 + 44 =
  38. 38.25 + 51 =
  39. 39.34 + 88 =
  40. 40.68 + 15 =

Answer key

  1. 143
  2. 121
  3. 100
  4. 60
  5. 100
  6. 46
  7. 70
  8. 139
  9. 110
  10. 131
  11. 109
  12. 65
  13. 135
  14. 95
  15. 124
  16. 69
  17. 111
  18. 73
  19. 116
  20. 110
  21. 105
  22. 78
  23. 98
  24. 65
  25. 108
  26. 85
  27. 127
  28. 68
  29. 75
  30. 102
  31. 147
  32. 94
  33. 119
  34. 155
  35. 120
  36. 79
  37. 95
  38. 76
  39. 122
  40. 83

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