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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 877 · 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. 1.66 + 45 =
  2. 2.33 + 14 =
  3. 3.34 + 52 =
  4. 4.63 + 41 =
  5. 5.72 + 87 =
  6. 6.32 + 85 =
  7. 7.85 + 59 =
  8. 8.66 + 41 =
  9. 9.86 + 45 =
  10. 10.75 + 25 =
  11. 11.31 + 46 =
  12. 12.69 + 31 =
  13. 13.33 + 76 =
  14. 14.28 + 59 =
  15. 15.63 + 46 =
  16. 16.78 + 22 =
  17. 17.55 + 61 =
  18. 18.78 + 75 =
  19. 19.50 + 64 =
  20. 20.57 + 85 =
  21. 21.77 + 42 =
  22. 22.86 + 26 =
  23. 23.41 + 86 =
  24. 24.84 + 75 =
  25. 25.48 + 17 =
  26. 26.84 + 54 =
  27. 27.24 + 21 =
  28. 28.65 + 56 =
  29. 29.71 + 61 =
  30. 30.83 + 68 =
  31. 31.82 + 13 =
  32. 32.36 + 64 =
  33. 33.33 + 27 =
  34. 34.31 + 29 =
  35. 35.34 + 85 =
  36. 36.70 + 58 =
  37. 37.66 + 85 =
  38. 38.28 + 57 =
  39. 39.62 + 21 =
  40. 40.78 + 17 =

Answer key

  1. 111
  2. 47
  3. 86
  4. 104
  5. 159
  6. 117
  7. 144
  8. 107
  9. 131
  10. 100
  11. 77
  12. 100
  13. 109
  14. 87
  15. 109
  16. 100
  17. 116
  18. 153
  19. 114
  20. 142
  21. 119
  22. 112
  23. 127
  24. 159
  25. 65
  26. 138
  27. 45
  28. 121
  29. 132
  30. 151
  31. 95
  32. 100
  33. 60
  34. 60
  35. 119
  36. 128
  37. 151
  38. 85
  39. 83
  40. 95

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