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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 328 · 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. 1.24 + 65 =
  2. 2.29 + 29 =
  3. 3.43 + 29 =
  4. 4.83 + 31 =
  5. 5.33 + 44 =
  6. 6.53 + 85 =
  7. 7.24 + 55 =
  8. 8.32 + 76 =
  9. 9.68 + 69 =
  10. 10.35 + 13 =
  11. 11.69 + 52 =
  12. 12.73 + 56 =
  13. 13.82 + 34 =
  14. 14.34 + 15 =
  15. 15.72 + 88 =
  16. 16.40 + 76 =
  17. 17.63 + 61 =
  18. 18.59 + 61 =
  19. 19.70 + 34 =
  20. 20.69 + 25 =
  21. 21.77 + 42 =
  22. 22.28 + 39 =
  23. 23.79 + 44 =
  24. 24.69 + 16 =
  25. 25.64 + 14 =
  26. 26.77 + 24 =
  27. 27.45 + 77 =
  28. 28.81 + 53 =
  29. 29.28 + 21 =
  30. 30.77 + 15 =
  31. 31.29 + 75 =
  32. 32.40 + 82 =
  33. 33.88 + 42 =
  34. 34.46 + 31 =
  35. 35.31 + 83 =
  36. 36.49 + 23 =
  37. 37.51 + 86 =
  38. 38.36 + 16 =
  39. 39.37 + 71 =
  40. 40.89 + 77 =

Answer key

  1. 89
  2. 58
  3. 72
  4. 114
  5. 77
  6. 138
  7. 79
  8. 108
  9. 137
  10. 48
  11. 121
  12. 129
  13. 116
  14. 49
  15. 160
  16. 116
  17. 124
  18. 120
  19. 104
  20. 94
  21. 119
  22. 67
  23. 123
  24. 85
  25. 78
  26. 101
  27. 122
  28. 134
  29. 49
  30. 92
  31. 104
  32. 122
  33. 130
  34. 77
  35. 114
  36. 72
  37. 137
  38. 52
  39. 108
  40. 166

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