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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 99 · 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. 1.58 + 86 =
  2. 2.79 + 25 =
  3. 3.26 + 89 =
  4. 4.65 + 64 =
  5. 5.51 + 35 =
  6. 6.80 + 48 =
  7. 7.38 + 54 =
  8. 8.39 + 62 =
  9. 9.80 + 86 =
  10. 10.44 + 83 =
  11. 11.32 + 63 =
  12. 12.59 + 43 =
  13. 13.73 + 12 =
  14. 14.82 + 71 =
  15. 15.21 + 64 =
  16. 16.71 + 61 =
  17. 17.43 + 55 =
  18. 18.68 + 15 =
  19. 19.44 + 81 =
  20. 20.23 + 66 =
  21. 21.71 + 36 =
  22. 22.67 + 57 =
  23. 23.86 + 49 =
  24. 24.56 + 63 =
  25. 25.66 + 35 =
  26. 26.65 + 84 =
  27. 27.43 + 41 =
  28. 28.84 + 16 =
  29. 29.67 + 41 =
  30. 30.21 + 51 =
  31. 31.24 + 24 =
  32. 32.78 + 69 =
  33. 33.51 + 75 =
  34. 34.68 + 13 =
  35. 35.86 + 33 =
  36. 36.56 + 83 =
  37. 37.57 + 29 =
  38. 38.21 + 81 =
  39. 39.84 + 58 =
  40. 40.88 + 35 =

Answer key

  1. 144
  2. 104
  3. 115
  4. 129
  5. 86
  6. 128
  7. 92
  8. 101
  9. 166
  10. 127
  11. 95
  12. 102
  13. 85
  14. 153
  15. 85
  16. 132
  17. 98
  18. 83
  19. 125
  20. 89
  21. 107
  22. 124
  23. 135
  24. 119
  25. 101
  26. 149
  27. 84
  28. 100
  29. 108
  30. 72
  31. 48
  32. 147
  33. 126
  34. 81
  35. 119
  36. 139
  37. 86
  38. 102
  39. 142
  40. 123

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