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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 436 · 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. 1.65 + 18 =
  2. 2.26 + 41 =
  3. 3.57 + 59 =
  4. 4.83 + 51 =
  5. 5.24 + 84 =
  6. 6.79 + 52 =
  7. 7.86 + 29 =
  8. 8.71 + 41 =
  9. 9.80 + 21 =
  10. 10.32 + 59 =
  11. 11.56 + 87 =
  12. 12.60 + 51 =
  13. 13.79 + 71 =
  14. 14.30 + 85 =
  15. 15.79 + 21 =
  16. 16.83 + 45 =
  17. 17.78 + 75 =
  18. 18.52 + 83 =
  19. 19.59 + 35 =
  20. 20.70 + 22 =
  21. 21.21 + 49 =
  22. 22.27 + 88 =
  23. 23.83 + 53 =
  24. 24.35 + 22 =
  25. 25.74 + 81 =
  26. 26.88 + 17 =
  27. 27.84 + 84 =
  28. 28.82 + 81 =
  29. 29.36 + 61 =
  30. 30.36 + 19 =
  31. 31.44 + 39 =
  32. 32.43 + 84 =
  33. 33.41 + 86 =
  34. 34.43 + 82 =
  35. 35.50 + 27 =
  36. 36.54 + 13 =
  37. 37.31 + 16 =
  38. 38.36 + 41 =
  39. 39.30 + 19 =
  40. 40.30 + 55 =

Answer key

  1. 83
  2. 67
  3. 116
  4. 134
  5. 108
  6. 131
  7. 115
  8. 112
  9. 101
  10. 91
  11. 143
  12. 111
  13. 150
  14. 115
  15. 100
  16. 128
  17. 153
  18. 135
  19. 94
  20. 92
  21. 70
  22. 115
  23. 136
  24. 57
  25. 155
  26. 105
  27. 168
  28. 163
  29. 97
  30. 55
  31. 83
  32. 127
  33. 127
  34. 125
  35. 77
  36. 67
  37. 47
  38. 77
  39. 49
  40. 85

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