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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 714 · 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. 1.34 + 87 =
  2. 2.53 + 64 =
  3. 3.46 + 73 =
  4. 4.48 + 21 =
  5. 5.74 + 61 =
  6. 6.58 + 34 =
  7. 7.89 + 87 =
  8. 8.41 + 86 =
  9. 9.70 + 36 =
  10. 10.25 + 85 =
  11. 11.59 + 13 =
  12. 12.74 + 63 =
  13. 13.82 + 64 =
  14. 14.82 + 38 =
  15. 15.66 + 83 =
  16. 16.42 + 16 =
  17. 17.65 + 67 =
  18. 18.22 + 73 =
  19. 19.69 + 54 =
  20. 20.85 + 74 =
  21. 21.28 + 12 =
  22. 22.69 + 81 =
  23. 23.71 + 68 =
  24. 24.74 + 75 =
  25. 25.56 + 54 =
  26. 26.37 + 31 =
  27. 27.86 + 89 =
  28. 28.88 + 66 =
  29. 29.27 + 83 =
  30. 30.84 + 64 =
  31. 31.36 + 15 =
  32. 32.58 + 36 =
  33. 33.89 + 19 =
  34. 34.37 + 67 =
  35. 35.35 + 58 =
  36. 36.79 + 56 =
  37. 37.69 + 57 =
  38. 38.52 + 83 =
  39. 39.28 + 79 =
  40. 40.39 + 59 =

Answer key

  1. 121
  2. 117
  3. 119
  4. 69
  5. 135
  6. 92
  7. 176
  8. 127
  9. 106
  10. 110
  11. 72
  12. 137
  13. 146
  14. 120
  15. 149
  16. 58
  17. 132
  18. 95
  19. 123
  20. 159
  21. 40
  22. 150
  23. 139
  24. 149
  25. 110
  26. 68
  27. 175
  28. 154
  29. 110
  30. 148
  31. 51
  32. 94
  33. 108
  34. 104
  35. 93
  36. 135
  37. 126
  38. 135
  39. 107
  40. 98

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