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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 284 · 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. 1.51 + 14 =
  2. 2.57 + 38 =
  3. 3.85 + 85 =
  4. 4.80 + 33 =
  5. 5.80 + 78 =
  6. 6.26 + 39 =
  7. 7.24 + 53 =
  8. 8.29 + 29 =
  9. 9.75 + 82 =
  10. 10.26 + 28 =
  11. 11.65 + 45 =
  12. 12.89 + 72 =
  13. 13.79 + 86 =
  14. 14.56 + 59 =
  15. 15.53 + 35 =
  16. 16.78 + 64 =
  17. 17.23 + 71 =
  18. 18.69 + 13 =
  19. 19.48 + 45 =
  20. 20.29 + 22 =
  21. 21.62 + 69 =
  22. 22.56 + 66 =
  23. 23.85 + 84 =
  24. 24.33 + 35 =
  25. 25.82 + 58 =
  26. 26.21 + 73 =
  27. 27.26 + 68 =
  28. 28.89 + 29 =
  29. 29.45 + 76 =
  30. 30.81 + 86 =
  31. 31.82 + 64 =
  32. 32.23 + 72 =
  33. 33.76 + 61 =
  34. 34.38 + 47 =
  35. 35.32 + 46 =
  36. 36.35 + 88 =
  37. 37.80 + 25 =
  38. 38.58 + 31 =
  39. 39.68 + 15 =
  40. 40.78 + 31 =

Answer key

  1. 65
  2. 95
  3. 170
  4. 113
  5. 158
  6. 65
  7. 77
  8. 58
  9. 157
  10. 54
  11. 110
  12. 161
  13. 165
  14. 115
  15. 88
  16. 142
  17. 94
  18. 82
  19. 93
  20. 51
  21. 131
  22. 122
  23. 169
  24. 68
  25. 140
  26. 94
  27. 94
  28. 118
  29. 121
  30. 167
  31. 146
  32. 95
  33. 137
  34. 85
  35. 78
  36. 123
  37. 105
  38. 89
  39. 83
  40. 109

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