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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 584 · 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. 1.45 + 29 =
  2. 2.28 + 87 =
  3. 3.38 + 75 =
  4. 4.53 + 83 =
  5. 5.81 + 53 =
  6. 6.70 + 61 =
  7. 7.83 + 25 =
  8. 8.69 + 13 =
  9. 9.31 + 26 =
  10. 10.58 + 42 =
  11. 11.62 + 27 =
  12. 12.35 + 28 =
  13. 13.50 + 21 =
  14. 14.49 + 32 =
  15. 15.74 + 14 =
  16. 16.83 + 81 =
  17. 17.21 + 62 =
  18. 18.77 + 17 =
  19. 19.83 + 31 =
  20. 20.23 + 63 =
  21. 21.37 + 17 =
  22. 22.63 + 41 =
  23. 23.78 + 35 =
  24. 24.43 + 46 =
  25. 25.79 + 39 =
  26. 26.64 + 65 =
  27. 27.85 + 35 =
  28. 28.80 + 87 =
  29. 29.88 + 18 =
  30. 30.35 + 55 =
  31. 31.47 + 23 =
  32. 32.66 + 48 =
  33. 33.68 + 36 =
  34. 34.26 + 14 =
  35. 35.74 + 69 =
  36. 36.32 + 83 =
  37. 37.29 + 77 =
  38. 38.73 + 71 =
  39. 39.39 + 59 =
  40. 40.39 + 63 =

Answer key

  1. 74
  2. 115
  3. 113
  4. 136
  5. 134
  6. 131
  7. 108
  8. 82
  9. 57
  10. 100
  11. 89
  12. 63
  13. 71
  14. 81
  15. 88
  16. 164
  17. 83
  18. 94
  19. 114
  20. 86
  21. 54
  22. 104
  23. 113
  24. 89
  25. 118
  26. 129
  27. 120
  28. 167
  29. 106
  30. 90
  31. 70
  32. 114
  33. 104
  34. 40
  35. 143
  36. 115
  37. 106
  38. 144
  39. 98
  40. 102

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