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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 634 · 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. 1.22 + 87 =
  2. 2.76 + 77 =
  3. 3.83 + 79 =
  4. 4.54 + 31 =
  5. 5.31 + 28 =
  6. 6.37 + 42 =
  7. 7.30 + 34 =
  8. 8.53 + 57 =
  9. 9.54 + 44 =
  10. 10.74 + 31 =
  11. 11.86 + 39 =
  12. 12.46 + 41 =
  13. 13.77 + 61 =
  14. 14.27 + 19 =
  15. 15.63 + 74 =
  16. 16.39 + 69 =
  17. 17.72 + 83 =
  18. 18.77 + 26 =
  19. 19.46 + 34 =
  20. 20.29 + 34 =
  21. 21.36 + 26 =
  22. 22.30 + 63 =
  23. 23.75 + 66 =
  24. 24.89 + 54 =
  25. 25.36 + 72 =
  26. 26.76 + 43 =
  27. 27.57 + 45 =
  28. 28.87 + 21 =
  29. 29.40 + 22 =
  30. 30.84 + 28 =
  31. 31.27 + 17 =
  32. 32.72 + 66 =
  33. 33.81 + 46 =
  34. 34.51 + 61 =
  35. 35.82 + 31 =
  36. 36.29 + 86 =
  37. 37.58 + 21 =
  38. 38.38 + 49 =
  39. 39.60 + 68 =
  40. 40.31 + 53 =

Answer key

  1. 109
  2. 153
  3. 162
  4. 85
  5. 59
  6. 79
  7. 64
  8. 110
  9. 98
  10. 105
  11. 125
  12. 87
  13. 138
  14. 46
  15. 137
  16. 108
  17. 155
  18. 103
  19. 80
  20. 63
  21. 62
  22. 93
  23. 141
  24. 143
  25. 108
  26. 119
  27. 102
  28. 108
  29. 62
  30. 112
  31. 44
  32. 138
  33. 127
  34. 112
  35. 113
  36. 115
  37. 79
  38. 87
  39. 128
  40. 84

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