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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 921 · 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. 1.61 + 14 =
  2. 2.52 + 83 =
  3. 3.24 + 31 =
  4. 4.75 + 37 =
  5. 5.73 + 14 =
  6. 6.42 + 73 =
  7. 7.51 + 27 =
  8. 8.26 + 28 =
  9. 9.36 + 57 =
  10. 10.55 + 66 =
  11. 11.80 + 47 =
  12. 12.47 + 36 =
  13. 13.71 + 74 =
  14. 14.56 + 58 =
  15. 15.61 + 57 =
  16. 16.89 + 29 =
  17. 17.26 + 34 =
  18. 18.89 + 35 =
  19. 19.59 + 88 =
  20. 20.60 + 79 =
  21. 21.36 + 12 =
  22. 22.73 + 39 =
  23. 23.87 + 43 =
  24. 24.47 + 18 =
  25. 25.77 + 17 =
  26. 26.21 + 25 =
  27. 27.29 + 15 =
  28. 28.47 + 81 =
  29. 29.81 + 54 =
  30. 30.61 + 39 =
  31. 31.54 + 85 =
  32. 32.41 + 51 =
  33. 33.56 + 21 =
  34. 34.69 + 81 =
  35. 35.86 + 31 =
  36. 36.85 + 88 =
  37. 37.39 + 44 =
  38. 38.64 + 71 =
  39. 39.60 + 22 =
  40. 40.43 + 74 =

Answer key

  1. 75
  2. 135
  3. 55
  4. 112
  5. 87
  6. 115
  7. 78
  8. 54
  9. 93
  10. 121
  11. 127
  12. 83
  13. 145
  14. 114
  15. 118
  16. 118
  17. 60
  18. 124
  19. 147
  20. 139
  21. 48
  22. 112
  23. 130
  24. 65
  25. 94
  26. 46
  27. 44
  28. 128
  29. 135
  30. 100
  31. 139
  32. 92
  33. 77
  34. 150
  35. 117
  36. 173
  37. 83
  38. 135
  39. 82
  40. 117

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