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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 152 · 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. 1.72 + 85 =
  2. 2.53 + 33 =
  3. 3.42 + 57 =
  4. 4.40 + 41 =
  5. 5.45 + 55 =
  6. 6.43 + 67 =
  7. 7.71 + 41 =
  8. 8.59 + 72 =
  9. 9.70 + 77 =
  10. 10.31 + 12 =
  11. 11.43 + 32 =
  12. 12.37 + 42 =
  13. 13.25 + 38 =
  14. 14.81 + 61 =
  15. 15.49 + 21 =
  16. 16.77 + 45 =
  17. 17.29 + 85 =
  18. 18.52 + 79 =
  19. 19.64 + 15 =
  20. 20.88 + 14 =
  21. 21.40 + 68 =
  22. 22.40 + 25 =
  23. 23.82 + 13 =
  24. 24.29 + 51 =
  25. 25.26 + 31 =
  26. 26.65 + 57 =
  27. 27.74 + 28 =
  28. 28.56 + 56 =
  29. 29.74 + 15 =
  30. 30.71 + 48 =
  31. 31.22 + 13 =
  32. 32.72 + 25 =
  33. 33.84 + 32 =
  34. 34.87 + 24 =
  35. 35.43 + 29 =
  36. 36.26 + 29 =
  37. 37.49 + 16 =
  38. 38.73 + 14 =
  39. 39.27 + 69 =
  40. 40.70 + 86 =

Answer key

  1. 157
  2. 86
  3. 99
  4. 81
  5. 100
  6. 110
  7. 112
  8. 131
  9. 147
  10. 43
  11. 75
  12. 79
  13. 63
  14. 142
  15. 70
  16. 122
  17. 114
  18. 131
  19. 79
  20. 102
  21. 108
  22. 65
  23. 95
  24. 80
  25. 57
  26. 122
  27. 102
  28. 112
  29. 89
  30. 119
  31. 35
  32. 97
  33. 116
  34. 111
  35. 72
  36. 55
  37. 65
  38. 87
  39. 96
  40. 156

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