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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 891 · 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. 1.80 + 89 =
  2. 2.55 + 33 =
  3. 3.43 + 62 =
  4. 4.43 + 71 =
  5. 5.73 + 38 =
  6. 6.36 + 46 =
  7. 7.39 + 51 =
  8. 8.69 + 35 =
  9. 9.60 + 21 =
  10. 10.40 + 14 =
  11. 11.37 + 71 =
  12. 12.73 + 55 =
  13. 13.56 + 61 =
  14. 14.56 + 18 =
  15. 15.74 + 84 =
  16. 16.52 + 55 =
  17. 17.79 + 69 =
  18. 18.34 + 41 =
  19. 19.37 + 73 =
  20. 20.71 + 57 =
  21. 21.72 + 27 =
  22. 22.49 + 85 =
  23. 23.68 + 21 =
  24. 24.39 + 59 =
  25. 25.64 + 66 =
  26. 26.76 + 51 =
  27. 27.77 + 82 =
  28. 28.81 + 26 =
  29. 29.82 + 28 =
  30. 30.30 + 82 =
  31. 31.39 + 85 =
  32. 32.74 + 81 =
  33. 33.75 + 61 =
  34. 34.72 + 84 =
  35. 35.37 + 59 =
  36. 36.32 + 46 =
  37. 37.30 + 74 =
  38. 38.32 + 41 =
  39. 39.22 + 71 =
  40. 40.83 + 23 =

Answer key

  1. 169
  2. 88
  3. 105
  4. 114
  5. 111
  6. 82
  7. 90
  8. 104
  9. 81
  10. 54
  11. 108
  12. 128
  13. 117
  14. 74
  15. 158
  16. 107
  17. 148
  18. 75
  19. 110
  20. 128
  21. 99
  22. 134
  23. 89
  24. 98
  25. 130
  26. 127
  27. 159
  28. 107
  29. 110
  30. 112
  31. 124
  32. 155
  33. 136
  34. 156
  35. 96
  36. 78
  37. 104
  38. 73
  39. 93
  40. 106

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