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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 864 · 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. 1.35 + 74 =
  2. 2.61 + 62 =
  3. 3.41 + 81 =
  4. 4.87 + 64 =
  5. 5.34 + 73 =
  6. 6.40 + 81 =
  7. 7.52 + 32 =
  8. 8.31 + 31 =
  9. 9.65 + 16 =
  10. 10.22 + 17 =
  11. 11.46 + 59 =
  12. 12.69 + 21 =
  13. 13.24 + 31 =
  14. 14.31 + 14 =
  15. 15.77 + 62 =
  16. 16.41 + 88 =
  17. 17.66 + 32 =
  18. 18.22 + 41 =
  19. 19.29 + 51 =
  20. 20.62 + 81 =
  21. 21.64 + 35 =
  22. 22.52 + 33 =
  23. 23.72 + 12 =
  24. 24.25 + 34 =
  25. 25.23 + 46 =
  26. 26.40 + 49 =
  27. 27.35 + 49 =
  28. 28.59 + 21 =
  29. 29.44 + 71 =
  30. 30.57 + 51 =
  31. 31.56 + 13 =
  32. 32.80 + 26 =
  33. 33.79 + 17 =
  34. 34.56 + 21 =
  35. 35.31 + 49 =
  36. 36.37 + 63 =
  37. 37.47 + 27 =
  38. 38.49 + 89 =
  39. 39.39 + 75 =
  40. 40.69 + 85 =

Answer key

  1. 109
  2. 123
  3. 122
  4. 151
  5. 107
  6. 121
  7. 84
  8. 62
  9. 81
  10. 39
  11. 105
  12. 90
  13. 55
  14. 45
  15. 139
  16. 129
  17. 98
  18. 63
  19. 80
  20. 143
  21. 99
  22. 85
  23. 84
  24. 59
  25. 69
  26. 89
  27. 84
  28. 80
  29. 115
  30. 108
  31. 69
  32. 106
  33. 96
  34. 77
  35. 80
  36. 100
  37. 74
  38. 138
  39. 114
  40. 154

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