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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 198 · 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 + 42 =
  2. 2.41 + 38 =
  3. 3.72 + 64 =
  4. 4.69 + 56 =
  5. 5.24 + 18 =
  6. 6.68 + 65 =
  7. 7.66 + 17 =
  8. 8.82 + 29 =
  9. 9.83 + 69 =
  10. 10.69 + 41 =
  11. 11.73 + 18 =
  12. 12.72 + 75 =
  13. 13.75 + 21 =
  14. 14.53 + 23 =
  15. 15.52 + 38 =
  16. 16.21 + 56 =
  17. 17.48 + 55 =
  18. 18.72 + 63 =
  19. 19.74 + 81 =
  20. 20.50 + 31 =
  21. 21.42 + 88 =
  22. 22.21 + 41 =
  23. 23.39 + 16 =
  24. 24.45 + 18 =
  25. 25.81 + 84 =
  26. 26.32 + 54 =
  27. 27.53 + 84 =
  28. 28.84 + 77 =
  29. 29.87 + 61 =
  30. 30.86 + 51 =
  31. 31.53 + 33 =
  32. 32.32 + 83 =
  33. 33.40 + 72 =
  34. 34.26 + 55 =
  35. 35.52 + 87 =
  36. 36.50 + 81 =
  37. 37.37 + 78 =
  38. 38.31 + 65 =
  39. 39.59 + 87 =
  40. 40.48 + 79 =

Answer key

  1. 128
  2. 79
  3. 136
  4. 125
  5. 42
  6. 133
  7. 83
  8. 111
  9. 152
  10. 110
  11. 91
  12. 147
  13. 96
  14. 76
  15. 90
  16. 77
  17. 103
  18. 135
  19. 155
  20. 81
  21. 130
  22. 62
  23. 55
  24. 63
  25. 165
  26. 86
  27. 137
  28. 161
  29. 148
  30. 137
  31. 86
  32. 115
  33. 112
  34. 81
  35. 139
  36. 131
  37. 115
  38. 96
  39. 146
  40. 127

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