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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 319 · 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. 1.86 + 82 =
  2. 2.56 + 14 =
  3. 3.33 + 81 =
  4. 4.48 + 31 =
  5. 5.22 + 86 =
  6. 6.80 + 18 =
  7. 7.68 + 67 =
  8. 8.24 + 75 =
  9. 9.51 + 52 =
  10. 10.62 + 16 =
  11. 11.54 + 24 =
  12. 12.34 + 67 =
  13. 13.40 + 13 =
  14. 14.86 + 64 =
  15. 15.83 + 23 =
  16. 16.47 + 19 =
  17. 17.32 + 18 =
  18. 18.42 + 69 =
  19. 19.43 + 12 =
  20. 20.48 + 87 =
  21. 21.78 + 76 =
  22. 22.67 + 66 =
  23. 23.25 + 58 =
  24. 24.58 + 48 =
  25. 25.29 + 25 =
  26. 26.30 + 43 =
  27. 27.55 + 63 =
  28. 28.32 + 17 =
  29. 29.23 + 71 =
  30. 30.68 + 21 =
  31. 31.66 + 72 =
  32. 32.73 + 84 =
  33. 33.48 + 13 =
  34. 34.80 + 13 =
  35. 35.54 + 77 =
  36. 36.39 + 72 =
  37. 37.34 + 38 =
  38. 38.89 + 88 =
  39. 39.54 + 72 =
  40. 40.24 + 16 =

Answer key

  1. 168
  2. 70
  3. 114
  4. 79
  5. 108
  6. 98
  7. 135
  8. 99
  9. 103
  10. 78
  11. 78
  12. 101
  13. 53
  14. 150
  15. 106
  16. 66
  17. 50
  18. 111
  19. 55
  20. 135
  21. 154
  22. 133
  23. 83
  24. 106
  25. 54
  26. 73
  27. 118
  28. 49
  29. 94
  30. 89
  31. 138
  32. 157
  33. 61
  34. 93
  35. 131
  36. 111
  37. 72
  38. 177
  39. 126
  40. 40

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