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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 302 · 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. 1.84 + 25 =
  2. 2.23 + 65 =
  3. 3.47 + 33 =
  4. 4.55 + 57 =
  5. 5.55 + 75 =
  6. 6.38 + 27 =
  7. 7.28 + 37 =
  8. 8.85 + 36 =
  9. 9.50 + 67 =
  10. 10.37 + 16 =
  11. 11.46 + 13 =
  12. 12.64 + 44 =
  13. 13.52 + 18 =
  14. 14.78 + 44 =
  15. 15.83 + 22 =
  16. 16.80 + 78 =
  17. 17.76 + 21 =
  18. 18.52 + 59 =
  19. 19.51 + 73 =
  20. 20.67 + 68 =
  21. 21.26 + 52 =
  22. 22.86 + 74 =
  23. 23.89 + 63 =
  24. 24.77 + 18 =
  25. 25.59 + 76 =
  26. 26.40 + 82 =
  27. 27.29 + 29 =
  28. 28.75 + 17 =
  29. 29.39 + 16 =
  30. 30.79 + 43 =
  31. 31.45 + 31 =
  32. 32.70 + 19 =
  33. 33.79 + 27 =
  34. 34.35 + 74 =
  35. 35.87 + 85 =
  36. 36.25 + 38 =
  37. 37.54 + 29 =
  38. 38.46 + 83 =
  39. 39.50 + 64 =
  40. 40.67 + 57 =

Answer key

  1. 109
  2. 88
  3. 80
  4. 112
  5. 130
  6. 65
  7. 65
  8. 121
  9. 117
  10. 53
  11. 59
  12. 108
  13. 70
  14. 122
  15. 105
  16. 158
  17. 97
  18. 111
  19. 124
  20. 135
  21. 78
  22. 160
  23. 152
  24. 95
  25. 135
  26. 122
  27. 58
  28. 92
  29. 55
  30. 122
  31. 76
  32. 89
  33. 106
  34. 109
  35. 172
  36. 63
  37. 83
  38. 129
  39. 114
  40. 124

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