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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 705 · 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 + 59 =
  2. 2.75 + 21 =
  3. 3.64 + 17 =
  4. 4.86 + 69 =
  5. 5.34 + 39 =
  6. 6.39 + 31 =
  7. 7.56 + 82 =
  8. 8.49 + 59 =
  9. 9.86 + 51 =
  10. 10.42 + 28 =
  11. 11.36 + 84 =
  12. 12.59 + 35 =
  13. 13.64 + 85 =
  14. 14.71 + 17 =
  15. 15.23 + 41 =
  16. 16.28 + 82 =
  17. 17.68 + 81 =
  18. 18.43 + 58 =
  19. 19.56 + 81 =
  20. 20.54 + 78 =
  21. 21.32 + 18 =
  22. 22.80 + 81 =
  23. 23.34 + 66 =
  24. 24.74 + 21 =
  25. 25.23 + 61 =
  26. 26.76 + 67 =
  27. 27.74 + 79 =
  28. 28.73 + 15 =
  29. 29.27 + 56 =
  30. 30.47 + 68 =
  31. 31.47 + 63 =
  32. 32.66 + 81 =
  33. 33.52 + 51 =
  34. 34.35 + 16 =
  35. 35.27 + 59 =
  36. 36.51 + 41 =
  37. 37.28 + 81 =
  38. 38.72 + 82 =
  39. 39.79 + 65 =
  40. 40.51 + 84 =

Answer key

  1. 95
  2. 96
  3. 81
  4. 155
  5. 73
  6. 70
  7. 138
  8. 108
  9. 137
  10. 70
  11. 120
  12. 94
  13. 149
  14. 88
  15. 64
  16. 110
  17. 149
  18. 101
  19. 137
  20. 132
  21. 50
  22. 161
  23. 100
  24. 95
  25. 84
  26. 143
  27. 153
  28. 88
  29. 83
  30. 115
  31. 110
  32. 147
  33. 103
  34. 51
  35. 86
  36. 92
  37. 109
  38. 154
  39. 144
  40. 135

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