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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 911 · 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. 1.43 + 27 =
  2. 2.26 + 64 =
  3. 3.29 + 88 =
  4. 4.85 + 67 =
  5. 5.61 + 13 =
  6. 6.55 + 67 =
  7. 7.68 + 46 =
  8. 8.48 + 55 =
  9. 9.86 + 75 =
  10. 10.65 + 65 =
  11. 11.45 + 34 =
  12. 12.52 + 42 =
  13. 13.72 + 37 =
  14. 14.42 + 23 =
  15. 15.82 + 29 =
  16. 16.36 + 67 =
  17. 17.58 + 74 =
  18. 18.38 + 71 =
  19. 19.39 + 79 =
  20. 20.80 + 83 =
  21. 21.84 + 45 =
  22. 22.58 + 87 =
  23. 23.86 + 46 =
  24. 24.78 + 83 =
  25. 25.74 + 55 =
  26. 26.49 + 33 =
  27. 27.26 + 86 =
  28. 28.62 + 37 =
  29. 29.56 + 55 =
  30. 30.86 + 81 =
  31. 31.46 + 25 =
  32. 32.21 + 19 =
  33. 33.32 + 51 =
  34. 34.80 + 41 =
  35. 35.73 + 67 =
  36. 36.79 + 68 =
  37. 37.21 + 49 =
  38. 38.63 + 19 =
  39. 39.66 + 69 =
  40. 40.26 + 76 =

Answer key

  1. 70
  2. 90
  3. 117
  4. 152
  5. 74
  6. 122
  7. 114
  8. 103
  9. 161
  10. 130
  11. 79
  12. 94
  13. 109
  14. 65
  15. 111
  16. 103
  17. 132
  18. 109
  19. 118
  20. 163
  21. 129
  22. 145
  23. 132
  24. 161
  25. 129
  26. 82
  27. 112
  28. 99
  29. 111
  30. 167
  31. 71
  32. 40
  33. 83
  34. 121
  35. 140
  36. 147
  37. 70
  38. 82
  39. 135
  40. 102

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