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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 327 · 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 + 59 =
  2. 2.40 + 17 =
  3. 3.78 + 15 =
  4. 4.31 + 48 =
  5. 5.50 + 43 =
  6. 6.61 + 29 =
  7. 7.61 + 28 =
  8. 8.52 + 46 =
  9. 9.35 + 75 =
  10. 10.87 + 71 =
  11. 11.71 + 44 =
  12. 12.51 + 81 =
  13. 13.35 + 82 =
  14. 14.32 + 14 =
  15. 15.37 + 51 =
  16. 16.34 + 22 =
  17. 17.68 + 68 =
  18. 18.83 + 31 =
  19. 19.54 + 49 =
  20. 20.30 + 76 =
  21. 21.36 + 72 =
  22. 22.21 + 78 =
  23. 23.78 + 64 =
  24. 24.48 + 13 =
  25. 25.81 + 89 =
  26. 26.49 + 58 =
  27. 27.89 + 13 =
  28. 28.31 + 41 =
  29. 29.31 + 14 =
  30. 30.28 + 89 =
  31. 31.58 + 39 =
  32. 32.42 + 37 =
  33. 33.63 + 77 =
  34. 34.34 + 21 =
  35. 35.64 + 26 =
  36. 36.52 + 38 =
  37. 37.83 + 73 =
  38. 38.52 + 57 =
  39. 39.36 + 84 =
  40. 40.69 + 31 =

Answer key

  1. 144
  2. 57
  3. 93
  4. 79
  5. 93
  6. 90
  7. 89
  8. 98
  9. 110
  10. 158
  11. 115
  12. 132
  13. 117
  14. 46
  15. 88
  16. 56
  17. 136
  18. 114
  19. 103
  20. 106
  21. 108
  22. 99
  23. 142
  24. 61
  25. 170
  26. 107
  27. 102
  28. 72
  29. 45
  30. 117
  31. 97
  32. 79
  33. 140
  34. 55
  35. 90
  36. 90
  37. 156
  38. 109
  39. 120
  40. 100

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