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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 336 · 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. 1.40 + 31 =
  2. 2.89 + 89 =
  3. 3.79 + 58 =
  4. 4.43 + 24 =
  5. 5.32 + 14 =
  6. 6.74 + 67 =
  7. 7.36 + 52 =
  8. 8.48 + 78 =
  9. 9.66 + 36 =
  10. 10.27 + 36 =
  11. 11.65 + 59 =
  12. 12.77 + 54 =
  13. 13.51 + 87 =
  14. 14.58 + 46 =
  15. 15.77 + 78 =
  16. 16.89 + 25 =
  17. 17.88 + 81 =
  18. 18.71 + 88 =
  19. 19.58 + 21 =
  20. 20.24 + 71 =
  21. 21.74 + 51 =
  22. 22.85 + 68 =
  23. 23.62 + 21 =
  24. 24.77 + 75 =
  25. 25.25 + 23 =
  26. 26.30 + 24 =
  27. 27.89 + 17 =
  28. 28.87 + 84 =
  29. 29.35 + 26 =
  30. 30.39 + 24 =
  31. 31.57 + 71 =
  32. 32.80 + 17 =
  33. 33.71 + 32 =
  34. 34.70 + 71 =
  35. 35.82 + 23 =
  36. 36.31 + 17 =
  37. 37.28 + 52 =
  38. 38.37 + 31 =
  39. 39.35 + 51 =
  40. 40.72 + 89 =

Answer key

  1. 71
  2. 178
  3. 137
  4. 67
  5. 46
  6. 141
  7. 88
  8. 126
  9. 102
  10. 63
  11. 124
  12. 131
  13. 138
  14. 104
  15. 155
  16. 114
  17. 169
  18. 159
  19. 79
  20. 95
  21. 125
  22. 153
  23. 83
  24. 152
  25. 48
  26. 54
  27. 106
  28. 171
  29. 61
  30. 63
  31. 128
  32. 97
  33. 103
  34. 141
  35. 105
  36. 48
  37. 80
  38. 68
  39. 86
  40. 161

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