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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 17 · 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. 1.36 + 31 =
  2. 2.41 + 52 =
  3. 3.62 + 74 =
  4. 4.39 + 79 =
  5. 5.21 + 16 =
  6. 6.22 + 21 =
  7. 7.56 + 69 =
  8. 8.51 + 31 =
  9. 9.30 + 78 =
  10. 10.44 + 48 =
  11. 11.39 + 41 =
  12. 12.67 + 55 =
  13. 13.38 + 36 =
  14. 14.55 + 89 =
  15. 15.85 + 31 =
  16. 16.48 + 31 =
  17. 17.63 + 37 =
  18. 18.69 + 51 =
  19. 19.87 + 84 =
  20. 20.84 + 68 =
  21. 21.60 + 89 =
  22. 22.72 + 65 =
  23. 23.51 + 29 =
  24. 24.48 + 69 =
  25. 25.44 + 66 =
  26. 26.41 + 21 =
  27. 27.46 + 33 =
  28. 28.23 + 85 =
  29. 29.39 + 22 =
  30. 30.62 + 82 =
  31. 31.86 + 49 =
  32. 32.78 + 22 =
  33. 33.34 + 36 =
  34. 34.64 + 14 =
  35. 35.26 + 64 =
  36. 36.68 + 31 =
  37. 37.28 + 81 =
  38. 38.39 + 84 =
  39. 39.50 + 39 =
  40. 40.83 + 85 =

Answer key

  1. 67
  2. 93
  3. 136
  4. 118
  5. 37
  6. 43
  7. 125
  8. 82
  9. 108
  10. 92
  11. 80
  12. 122
  13. 74
  14. 144
  15. 116
  16. 79
  17. 100
  18. 120
  19. 171
  20. 152
  21. 149
  22. 137
  23. 80
  24. 117
  25. 110
  26. 62
  27. 79
  28. 108
  29. 61
  30. 144
  31. 135
  32. 100
  33. 70
  34. 78
  35. 90
  36. 99
  37. 109
  38. 123
  39. 89
  40. 168

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