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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 257 · 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. 1.54 + 82 =
  2. 2.65 + 24 =
  3. 3.69 + 61 =
  4. 4.79 + 37 =
  5. 5.64 + 33 =
  6. 6.36 + 67 =
  7. 7.25 + 47 =
  8. 8.82 + 76 =
  9. 9.80 + 71 =
  10. 10.35 + 66 =
  11. 11.38 + 83 =
  12. 12.72 + 77 =
  13. 13.30 + 55 =
  14. 14.89 + 22 =
  15. 15.88 + 35 =
  16. 16.28 + 61 =
  17. 17.55 + 29 =
  18. 18.33 + 46 =
  19. 19.82 + 33 =
  20. 20.60 + 37 =
  21. 21.27 + 24 =
  22. 22.25 + 13 =
  23. 23.29 + 61 =
  24. 24.48 + 17 =
  25. 25.85 + 57 =
  26. 26.26 + 13 =
  27. 27.51 + 21 =
  28. 28.21 + 32 =
  29. 29.26 + 88 =
  30. 30.38 + 15 =
  31. 31.39 + 25 =
  32. 32.29 + 16 =
  33. 33.51 + 45 =
  34. 34.27 + 31 =
  35. 35.74 + 74 =
  36. 36.21 + 55 =
  37. 37.80 + 79 =
  38. 38.79 + 48 =
  39. 39.25 + 88 =
  40. 40.45 + 65 =

Answer key

  1. 136
  2. 89
  3. 130
  4. 116
  5. 97
  6. 103
  7. 72
  8. 158
  9. 151
  10. 101
  11. 121
  12. 149
  13. 85
  14. 111
  15. 123
  16. 89
  17. 84
  18. 79
  19. 115
  20. 97
  21. 51
  22. 38
  23. 90
  24. 65
  25. 142
  26. 39
  27. 72
  28. 53
  29. 114
  30. 53
  31. 64
  32. 45
  33. 96
  34. 58
  35. 148
  36. 76
  37. 159
  38. 127
  39. 113
  40. 110

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