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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 408 · 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. 1.33 + 72 =
  2. 2.64 + 28 =
  3. 3.31 + 14 =
  4. 4.52 + 82 =
  5. 5.86 + 48 =
  6. 6.38 + 18 =
  7. 7.84 + 88 =
  8. 8.32 + 29 =
  9. 9.23 + 43 =
  10. 10.71 + 41 =
  11. 11.32 + 26 =
  12. 12.49 + 64 =
  13. 13.31 + 52 =
  14. 14.55 + 39 =
  15. 15.66 + 61 =
  16. 16.47 + 28 =
  17. 17.62 + 34 =
  18. 18.21 + 79 =
  19. 19.44 + 72 =
  20. 20.70 + 66 =
  21. 21.60 + 54 =
  22. 22.79 + 79 =
  23. 23.64 + 69 =
  24. 24.58 + 24 =
  25. 25.79 + 33 =
  26. 26.24 + 17 =
  27. 27.33 + 18 =
  28. 28.28 + 84 =
  29. 29.85 + 38 =
  30. 30.86 + 17 =
  31. 31.38 + 16 =
  32. 32.49 + 63 =
  33. 33.32 + 12 =
  34. 34.80 + 17 =
  35. 35.64 + 29 =
  36. 36.84 + 31 =
  37. 37.40 + 47 =
  38. 38.60 + 61 =
  39. 39.83 + 72 =
  40. 40.48 + 18 =

Answer key

  1. 105
  2. 92
  3. 45
  4. 134
  5. 134
  6. 56
  7. 172
  8. 61
  9. 66
  10. 112
  11. 58
  12. 113
  13. 83
  14. 94
  15. 127
  16. 75
  17. 96
  18. 100
  19. 116
  20. 136
  21. 114
  22. 158
  23. 133
  24. 82
  25. 112
  26. 41
  27. 51
  28. 112
  29. 123
  30. 103
  31. 54
  32. 112
  33. 44
  34. 97
  35. 93
  36. 115
  37. 87
  38. 121
  39. 155
  40. 66

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