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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 54 · 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. 1.31 + 84 =
  2. 2.24 + 61 =
  3. 3.28 + 77 =
  4. 4.43 + 72 =
  5. 5.82 + 71 =
  6. 6.88 + 53 =
  7. 7.41 + 42 =
  8. 8.27 + 51 =
  9. 9.26 + 59 =
  10. 10.65 + 15 =
  11. 11.57 + 19 =
  12. 12.85 + 16 =
  13. 13.89 + 39 =
  14. 14.55 + 58 =
  15. 15.53 + 48 =
  16. 16.88 + 41 =
  17. 17.69 + 66 =
  18. 18.79 + 47 =
  19. 19.29 + 12 =
  20. 20.63 + 75 =
  21. 21.88 + 31 =
  22. 22.71 + 41 =
  23. 23.66 + 15 =
  24. 24.41 + 16 =
  25. 25.39 + 72 =
  26. 26.48 + 88 =
  27. 27.86 + 22 =
  28. 28.81 + 51 =
  29. 29.43 + 49 =
  30. 30.40 + 35 =
  31. 31.36 + 49 =
  32. 32.38 + 21 =
  33. 33.23 + 38 =
  34. 34.50 + 17 =
  35. 35.26 + 54 =
  36. 36.72 + 48 =
  37. 37.78 + 39 =
  38. 38.74 + 42 =
  39. 39.46 + 36 =
  40. 40.63 + 14 =

Answer key

  1. 115
  2. 85
  3. 105
  4. 115
  5. 153
  6. 141
  7. 83
  8. 78
  9. 85
  10. 80
  11. 76
  12. 101
  13. 128
  14. 113
  15. 101
  16. 129
  17. 135
  18. 126
  19. 41
  20. 138
  21. 119
  22. 112
  23. 81
  24. 57
  25. 111
  26. 136
  27. 108
  28. 132
  29. 92
  30. 75
  31. 85
  32. 59
  33. 61
  34. 67
  35. 80
  36. 120
  37. 117
  38. 116
  39. 82
  40. 77

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