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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 39 · 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. 1.34 + 33 =
  2. 2.59 + 69 =
  3. 3.49 + 71 =
  4. 4.64 + 15 =
  5. 5.51 + 69 =
  6. 6.35 + 54 =
  7. 7.85 + 42 =
  8. 8.23 + 67 =
  9. 9.84 + 33 =
  10. 10.60 + 82 =
  11. 11.38 + 42 =
  12. 12.23 + 66 =
  13. 13.89 + 16 =
  14. 14.49 + 33 =
  15. 15.52 + 23 =
  16. 16.22 + 21 =
  17. 17.67 + 87 =
  18. 18.83 + 31 =
  19. 19.45 + 22 =
  20. 20.24 + 39 =
  21. 21.37 + 32 =
  22. 22.32 + 23 =
  23. 23.82 + 21 =
  24. 24.86 + 62 =
  25. 25.56 + 71 =
  26. 26.85 + 77 =
  27. 27.64 + 61 =
  28. 28.70 + 66 =
  29. 29.57 + 18 =
  30. 30.77 + 37 =
  31. 31.62 + 72 =
  32. 32.73 + 55 =
  33. 33.72 + 34 =
  34. 34.78 + 53 =
  35. 35.45 + 61 =
  36. 36.66 + 41 =
  37. 37.64 + 52 =
  38. 38.43 + 29 =
  39. 39.82 + 84 =
  40. 40.55 + 49 =

Answer key

  1. 67
  2. 128
  3. 120
  4. 79
  5. 120
  6. 89
  7. 127
  8. 90
  9. 117
  10. 142
  11. 80
  12. 89
  13. 105
  14. 82
  15. 75
  16. 43
  17. 154
  18. 114
  19. 67
  20. 63
  21. 69
  22. 55
  23. 103
  24. 148
  25. 127
  26. 162
  27. 125
  28. 136
  29. 75
  30. 114
  31. 134
  32. 128
  33. 106
  34. 131
  35. 106
  36. 107
  37. 116
  38. 72
  39. 166
  40. 104

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