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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 254 · 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. 1.71 + 37 =
  2. 2.51 + 69 =
  3. 3.36 + 76 =
  4. 4.27 + 37 =
  5. 5.81 + 25 =
  6. 6.86 + 27 =
  7. 7.85 + 61 =
  8. 8.59 + 18 =
  9. 9.85 + 81 =
  10. 10.22 + 28 =
  11. 11.59 + 83 =
  12. 12.26 + 39 =
  13. 13.79 + 23 =
  14. 14.54 + 36 =
  15. 15.48 + 85 =
  16. 16.83 + 61 =
  17. 17.88 + 26 =
  18. 18.49 + 38 =
  19. 19.77 + 84 =
  20. 20.30 + 31 =
  21. 21.88 + 14 =
  22. 22.46 + 21 =
  23. 23.74 + 26 =
  24. 24.74 + 16 =
  25. 25.80 + 56 =
  26. 26.47 + 31 =
  27. 27.39 + 18 =
  28. 28.86 + 58 =
  29. 29.46 + 15 =
  30. 30.88 + 41 =
  31. 31.84 + 81 =
  32. 32.27 + 46 =
  33. 33.50 + 25 =
  34. 34.46 + 12 =
  35. 35.85 + 79 =
  36. 36.24 + 38 =
  37. 37.71 + 72 =
  38. 38.87 + 32 =
  39. 39.28 + 84 =
  40. 40.33 + 71 =

Answer key

  1. 108
  2. 120
  3. 112
  4. 64
  5. 106
  6. 113
  7. 146
  8. 77
  9. 166
  10. 50
  11. 142
  12. 65
  13. 102
  14. 90
  15. 133
  16. 144
  17. 114
  18. 87
  19. 161
  20. 61
  21. 102
  22. 67
  23. 100
  24. 90
  25. 136
  26. 78
  27. 57
  28. 144
  29. 61
  30. 129
  31. 165
  32. 73
  33. 75
  34. 58
  35. 164
  36. 62
  37. 143
  38. 119
  39. 112
  40. 104

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