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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 834 · 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. 1.77 + 45 =
  2. 2.85 + 82 =
  3. 3.39 + 74 =
  4. 4.81 + 28 =
  5. 5.55 + 67 =
  6. 6.58 + 21 =
  7. 7.85 + 88 =
  8. 8.26 + 24 =
  9. 9.88 + 57 =
  10. 10.66 + 18 =
  11. 11.43 + 77 =
  12. 12.22 + 78 =
  13. 13.77 + 82 =
  14. 14.88 + 51 =
  15. 15.48 + 76 =
  16. 16.45 + 62 =
  17. 17.30 + 34 =
  18. 18.46 + 61 =
  19. 19.25 + 35 =
  20. 20.63 + 65 =
  21. 21.50 + 37 =
  22. 22.34 + 52 =
  23. 23.72 + 82 =
  24. 24.84 + 36 =
  25. 25.24 + 71 =
  26. 26.82 + 46 =
  27. 27.36 + 23 =
  28. 28.52 + 51 =
  29. 29.85 + 53 =
  30. 30.30 + 74 =
  31. 31.59 + 64 =
  32. 32.89 + 61 =
  33. 33.45 + 59 =
  34. 34.31 + 34 =
  35. 35.37 + 68 =
  36. 36.64 + 37 =
  37. 37.56 + 21 =
  38. 38.44 + 21 =
  39. 39.42 + 41 =
  40. 40.32 + 45 =

Answer key

  1. 122
  2. 167
  3. 113
  4. 109
  5. 122
  6. 79
  7. 173
  8. 50
  9. 145
  10. 84
  11. 120
  12. 100
  13. 159
  14. 139
  15. 124
  16. 107
  17. 64
  18. 107
  19. 60
  20. 128
  21. 87
  22. 86
  23. 154
  24. 120
  25. 95
  26. 128
  27. 59
  28. 103
  29. 138
  30. 104
  31. 123
  32. 150
  33. 104
  34. 65
  35. 105
  36. 101
  37. 77
  38. 65
  39. 83
  40. 77

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