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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 861 · 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. 1.74 + 23 =
  2. 2.54 + 79 =
  3. 3.51 + 89 =
  4. 4.41 + 31 =
  5. 5.82 + 51 =
  6. 6.79 + 37 =
  7. 7.53 + 51 =
  8. 8.43 + 65 =
  9. 9.22 + 63 =
  10. 10.68 + 74 =
  11. 11.45 + 68 =
  12. 12.49 + 12 =
  13. 13.37 + 27 =
  14. 14.75 + 83 =
  15. 15.21 + 38 =
  16. 16.33 + 51 =
  17. 17.72 + 25 =
  18. 18.29 + 46 =
  19. 19.22 + 31 =
  20. 20.49 + 81 =
  21. 21.57 + 79 =
  22. 22.21 + 17 =
  23. 23.37 + 58 =
  24. 24.24 + 17 =
  25. 25.27 + 82 =
  26. 26.84 + 15 =
  27. 27.69 + 84 =
  28. 28.73 + 79 =
  29. 29.51 + 15 =
  30. 30.68 + 87 =
  31. 31.32 + 12 =
  32. 32.66 + 65 =
  33. 33.76 + 87 =
  34. 34.45 + 41 =
  35. 35.37 + 72 =
  36. 36.43 + 34 =
  37. 37.77 + 81 =
  38. 38.69 + 82 =
  39. 39.72 + 47 =
  40. 40.53 + 77 =

Answer key

  1. 97
  2. 133
  3. 140
  4. 72
  5. 133
  6. 116
  7. 104
  8. 108
  9. 85
  10. 142
  11. 113
  12. 61
  13. 64
  14. 158
  15. 59
  16. 84
  17. 97
  18. 75
  19. 53
  20. 130
  21. 136
  22. 38
  23. 95
  24. 41
  25. 109
  26. 99
  27. 153
  28. 152
  29. 66
  30. 155
  31. 44
  32. 131
  33. 163
  34. 86
  35. 109
  36. 77
  37. 158
  38. 151
  39. 119
  40. 130

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