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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 367 · 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. 1.85 + 22 =
  2. 2.36 + 63 =
  3. 3.21 + 51 =
  4. 4.33 + 39 =
  5. 5.82 + 63 =
  6. 6.52 + 36 =
  7. 7.72 + 67 =
  8. 8.72 + 69 =
  9. 9.54 + 54 =
  10. 10.77 + 85 =
  11. 11.28 + 23 =
  12. 12.39 + 19 =
  13. 13.25 + 53 =
  14. 14.23 + 72 =
  15. 15.49 + 41 =
  16. 16.73 + 34 =
  17. 17.35 + 31 =
  18. 18.22 + 62 =
  19. 19.76 + 25 =
  20. 20.53 + 78 =
  21. 21.84 + 81 =
  22. 22.33 + 45 =
  23. 23.25 + 31 =
  24. 24.31 + 13 =
  25. 25.69 + 38 =
  26. 26.78 + 52 =
  27. 27.30 + 72 =
  28. 28.75 + 71 =
  29. 29.25 + 16 =
  30. 30.36 + 12 =
  31. 31.62 + 87 =
  32. 32.22 + 87 =
  33. 33.78 + 81 =
  34. 34.81 + 77 =
  35. 35.36 + 21 =
  36. 36.41 + 71 =
  37. 37.32 + 86 =
  38. 38.78 + 73 =
  39. 39.52 + 44 =
  40. 40.37 + 69 =

Answer key

  1. 107
  2. 99
  3. 72
  4. 72
  5. 145
  6. 88
  7. 139
  8. 141
  9. 108
  10. 162
  11. 51
  12. 58
  13. 78
  14. 95
  15. 90
  16. 107
  17. 66
  18. 84
  19. 101
  20. 131
  21. 165
  22. 78
  23. 56
  24. 44
  25. 107
  26. 130
  27. 102
  28. 146
  29. 41
  30. 48
  31. 149
  32. 109
  33. 159
  34. 158
  35. 57
  36. 112
  37. 118
  38. 151
  39. 96
  40. 106

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