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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 917 · 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. 1.62 + 69 =
  2. 2.86 + 38 =
  3. 3.59 + 71 =
  4. 4.41 + 67 =
  5. 5.32 + 83 =
  6. 6.22 + 56 =
  7. 7.45 + 47 =
  8. 8.78 + 31 =
  9. 9.25 + 86 =
  10. 10.62 + 54 =
  11. 11.44 + 47 =
  12. 12.38 + 14 =
  13. 13.39 + 57 =
  14. 14.65 + 76 =
  15. 15.77 + 31 =
  16. 16.51 + 17 =
  17. 17.32 + 59 =
  18. 18.29 + 21 =
  19. 19.34 + 59 =
  20. 20.71 + 27 =
  21. 21.65 + 72 =
  22. 22.26 + 15 =
  23. 23.35 + 79 =
  24. 24.63 + 62 =
  25. 25.22 + 13 =
  26. 26.67 + 33 =
  27. 27.81 + 25 =
  28. 28.56 + 31 =
  29. 29.58 + 27 =
  30. 30.29 + 39 =
  31. 31.85 + 52 =
  32. 32.72 + 58 =
  33. 33.54 + 61 =
  34. 34.77 + 47 =
  35. 35.80 + 74 =
  36. 36.26 + 34 =
  37. 37.43 + 85 =
  38. 38.69 + 81 =
  39. 39.39 + 41 =
  40. 40.78 + 32 =

Answer key

  1. 131
  2. 124
  3. 130
  4. 108
  5. 115
  6. 78
  7. 92
  8. 109
  9. 111
  10. 116
  11. 91
  12. 52
  13. 96
  14. 141
  15. 108
  16. 68
  17. 91
  18. 50
  19. 93
  20. 98
  21. 137
  22. 41
  23. 114
  24. 125
  25. 35
  26. 100
  27. 106
  28. 87
  29. 85
  30. 68
  31. 137
  32. 130
  33. 115
  34. 124
  35. 154
  36. 60
  37. 128
  38. 150
  39. 80
  40. 110

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