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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 808 · 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. 1.31 + 34 =
  2. 2.31 + 32 =
  3. 3.82 + 52 =
  4. 4.59 + 35 =
  5. 5.35 + 53 =
  6. 6.82 + 74 =
  7. 7.32 + 48 =
  8. 8.41 + 73 =
  9. 9.43 + 28 =
  10. 10.66 + 13 =
  11. 11.63 + 61 =
  12. 12.85 + 18 =
  13. 13.50 + 61 =
  14. 14.69 + 48 =
  15. 15.22 + 19 =
  16. 16.26 + 73 =
  17. 17.54 + 42 =
  18. 18.85 + 83 =
  19. 19.84 + 47 =
  20. 20.79 + 29 =
  21. 21.63 + 51 =
  22. 22.23 + 26 =
  23. 23.43 + 72 =
  24. 24.79 + 32 =
  25. 25.62 + 41 =
  26. 26.39 + 39 =
  27. 27.62 + 87 =
  28. 28.50 + 73 =
  29. 29.75 + 69 =
  30. 30.51 + 46 =
  31. 31.29 + 26 =
  32. 32.23 + 52 =
  33. 33.76 + 76 =
  34. 34.70 + 47 =
  35. 35.68 + 37 =
  36. 36.66 + 71 =
  37. 37.51 + 49 =
  38. 38.68 + 44 =
  39. 39.84 + 57 =
  40. 40.59 + 84 =

Answer key

  1. 65
  2. 63
  3. 134
  4. 94
  5. 88
  6. 156
  7. 80
  8. 114
  9. 71
  10. 79
  11. 124
  12. 103
  13. 111
  14. 117
  15. 41
  16. 99
  17. 96
  18. 168
  19. 131
  20. 108
  21. 114
  22. 49
  23. 115
  24. 111
  25. 103
  26. 78
  27. 149
  28. 123
  29. 144
  30. 97
  31. 55
  32. 75
  33. 152
  34. 117
  35. 105
  36. 137
  37. 100
  38. 112
  39. 141
  40. 143

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