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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 884 · 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. 1.78 + 85 =
  2. 2.58 + 63 =
  3. 3.62 + 79 =
  4. 4.77 + 84 =
  5. 5.69 + 27 =
  6. 6.79 + 78 =
  7. 7.38 + 76 =
  8. 8.68 + 81 =
  9. 9.60 + 57 =
  10. 10.33 + 64 =
  11. 11.22 + 36 =
  12. 12.75 + 64 =
  13. 13.77 + 36 =
  14. 14.25 + 87 =
  15. 15.56 + 86 =
  16. 16.63 + 27 =
  17. 17.70 + 29 =
  18. 18.75 + 61 =
  19. 19.37 + 27 =
  20. 20.41 + 81 =
  21. 21.22 + 31 =
  22. 22.39 + 79 =
  23. 23.64 + 75 =
  24. 24.41 + 59 =
  25. 25.21 + 71 =
  26. 26.66 + 16 =
  27. 27.51 + 22 =
  28. 28.30 + 21 =
  29. 29.80 + 58 =
  30. 30.24 + 17 =
  31. 31.32 + 62 =
  32. 32.24 + 68 =
  33. 33.89 + 81 =
  34. 34.64 + 45 =
  35. 35.60 + 34 =
  36. 36.27 + 23 =
  37. 37.38 + 71 =
  38. 38.46 + 45 =
  39. 39.44 + 41 =
  40. 40.64 + 15 =

Answer key

  1. 163
  2. 121
  3. 141
  4. 161
  5. 96
  6. 157
  7. 114
  8. 149
  9. 117
  10. 97
  11. 58
  12. 139
  13. 113
  14. 112
  15. 142
  16. 90
  17. 99
  18. 136
  19. 64
  20. 122
  21. 53
  22. 118
  23. 139
  24. 100
  25. 92
  26. 82
  27. 73
  28. 51
  29. 138
  30. 41
  31. 94
  32. 92
  33. 170
  34. 109
  35. 94
  36. 50
  37. 109
  38. 91
  39. 85
  40. 79

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