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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 410 · 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. 1.52 + 59 =
  2. 2.88 + 24 =
  3. 3.66 + 83 =
  4. 4.72 + 81 =
  5. 5.78 + 42 =
  6. 6.50 + 71 =
  7. 7.42 + 31 =
  8. 8.70 + 63 =
  9. 9.30 + 64 =
  10. 10.21 + 53 =
  11. 11.24 + 19 =
  12. 12.26 + 51 =
  13. 13.38 + 49 =
  14. 14.39 + 72 =
  15. 15.23 + 19 =
  16. 16.38 + 71 =
  17. 17.72 + 25 =
  18. 18.57 + 23 =
  19. 19.25 + 82 =
  20. 20.72 + 55 =
  21. 21.67 + 29 =
  22. 22.89 + 89 =
  23. 23.39 + 68 =
  24. 24.49 + 71 =
  25. 25.85 + 57 =
  26. 26.46 + 21 =
  27. 27.74 + 27 =
  28. 28.30 + 68 =
  29. 29.77 + 33 =
  30. 30.67 + 54 =
  31. 31.66 + 28 =
  32. 32.36 + 69 =
  33. 33.88 + 37 =
  34. 34.24 + 58 =
  35. 35.39 + 31 =
  36. 36.47 + 87 =
  37. 37.75 + 69 =
  38. 38.73 + 83 =
  39. 39.28 + 32 =
  40. 40.26 + 69 =

Answer key

  1. 111
  2. 112
  3. 149
  4. 153
  5. 120
  6. 121
  7. 73
  8. 133
  9. 94
  10. 74
  11. 43
  12. 77
  13. 87
  14. 111
  15. 42
  16. 109
  17. 97
  18. 80
  19. 107
  20. 127
  21. 96
  22. 178
  23. 107
  24. 120
  25. 142
  26. 67
  27. 101
  28. 98
  29. 110
  30. 121
  31. 94
  32. 105
  33. 125
  34. 82
  35. 70
  36. 134
  37. 144
  38. 156
  39. 60
  40. 95

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