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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 843 · 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. 1.88 + 77 =
  2. 2.25 + 75 =
  3. 3.27 + 83 =
  4. 4.73 + 63 =
  5. 5.30 + 15 =
  6. 6.39 + 19 =
  7. 7.57 + 81 =
  8. 8.51 + 84 =
  9. 9.61 + 68 =
  10. 10.42 + 15 =
  11. 11.67 + 41 =
  12. 12.30 + 44 =
  13. 13.64 + 64 =
  14. 14.59 + 53 =
  15. 15.50 + 35 =
  16. 16.36 + 32 =
  17. 17.63 + 61 =
  18. 18.45 + 67 =
  19. 19.36 + 82 =
  20. 20.87 + 71 =
  21. 21.41 + 66 =
  22. 22.60 + 43 =
  23. 23.72 + 86 =
  24. 24.79 + 88 =
  25. 25.41 + 31 =
  26. 26.69 + 22 =
  27. 27.81 + 87 =
  28. 28.82 + 77 =
  29. 29.56 + 61 =
  30. 30.66 + 45 =
  31. 31.84 + 87 =
  32. 32.23 + 53 =
  33. 33.33 + 77 =
  34. 34.39 + 83 =
  35. 35.33 + 83 =
  36. 36.89 + 33 =
  37. 37.27 + 29 =
  38. 38.86 + 13 =
  39. 39.53 + 49 =
  40. 40.85 + 54 =

Answer key

  1. 165
  2. 100
  3. 110
  4. 136
  5. 45
  6. 58
  7. 138
  8. 135
  9. 129
  10. 57
  11. 108
  12. 74
  13. 128
  14. 112
  15. 85
  16. 68
  17. 124
  18. 112
  19. 118
  20. 158
  21. 107
  22. 103
  23. 158
  24. 167
  25. 72
  26. 91
  27. 168
  28. 159
  29. 117
  30. 111
  31. 171
  32. 76
  33. 110
  34. 122
  35. 116
  36. 122
  37. 56
  38. 99
  39. 102
  40. 139

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