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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 996 · 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. 1.39 + 71 =
  2. 2.57 + 77 =
  3. 3.24 + 88 =
  4. 4.24 + 79 =
  5. 5.22 + 62 =
  6. 6.41 + 43 =
  7. 7.35 + 79 =
  8. 8.82 + 31 =
  9. 9.57 + 61 =
  10. 10.55 + 76 =
  11. 11.46 + 43 =
  12. 12.54 + 54 =
  13. 13.46 + 56 =
  14. 14.43 + 25 =
  15. 15.40 + 36 =
  16. 16.38 + 59 =
  17. 17.30 + 81 =
  18. 18.25 + 47 =
  19. 19.22 + 23 =
  20. 20.43 + 45 =
  21. 21.42 + 17 =
  22. 22.55 + 19 =
  23. 23.78 + 51 =
  24. 24.27 + 26 =
  25. 25.40 + 35 =
  26. 26.85 + 31 =
  27. 27.35 + 51 =
  28. 28.36 + 56 =
  29. 29.74 + 78 =
  30. 30.78 + 15 =
  31. 31.42 + 65 =
  32. 32.66 + 69 =
  33. 33.69 + 64 =
  34. 34.79 + 78 =
  35. 35.40 + 21 =
  36. 36.51 + 43 =
  37. 37.25 + 38 =
  38. 38.64 + 13 =
  39. 39.25 + 24 =
  40. 40.58 + 89 =

Answer key

  1. 110
  2. 134
  3. 112
  4. 103
  5. 84
  6. 84
  7. 114
  8. 113
  9. 118
  10. 131
  11. 89
  12. 108
  13. 102
  14. 68
  15. 76
  16. 97
  17. 111
  18. 72
  19. 45
  20. 88
  21. 59
  22. 74
  23. 129
  24. 53
  25. 75
  26. 116
  27. 86
  28. 92
  29. 152
  30. 93
  31. 107
  32. 135
  33. 133
  34. 157
  35. 61
  36. 94
  37. 63
  38. 77
  39. 49
  40. 147

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