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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 965 · 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. 1.26 + 31 =
  2. 2.55 + 74 =
  3. 3.28 + 41 =
  4. 4.50 + 79 =
  5. 5.36 + 67 =
  6. 6.32 + 44 =
  7. 7.37 + 27 =
  8. 8.80 + 58 =
  9. 9.30 + 35 =
  10. 10.45 + 58 =
  11. 11.29 + 35 =
  12. 12.87 + 17 =
  13. 13.38 + 39 =
  14. 14.40 + 24 =
  15. 15.80 + 83 =
  16. 16.44 + 24 =
  17. 17.59 + 42 =
  18. 18.55 + 26 =
  19. 19.37 + 26 =
  20. 20.59 + 49 =
  21. 21.52 + 49 =
  22. 22.76 + 14 =
  23. 23.85 + 21 =
  24. 24.37 + 32 =
  25. 25.85 + 73 =
  26. 26.37 + 67 =
  27. 27.83 + 72 =
  28. 28.89 + 64 =
  29. 29.41 + 42 =
  30. 30.26 + 37 =
  31. 31.39 + 54 =
  32. 32.50 + 53 =
  33. 33.59 + 32 =
  34. 34.76 + 62 =
  35. 35.24 + 62 =
  36. 36.58 + 51 =
  37. 37.43 + 82 =
  38. 38.41 + 49 =
  39. 39.53 + 27 =
  40. 40.36 + 15 =

Answer key

  1. 57
  2. 129
  3. 69
  4. 129
  5. 103
  6. 76
  7. 64
  8. 138
  9. 65
  10. 103
  11. 64
  12. 104
  13. 77
  14. 64
  15. 163
  16. 68
  17. 101
  18. 81
  19. 63
  20. 108
  21. 101
  22. 90
  23. 106
  24. 69
  25. 158
  26. 104
  27. 155
  28. 153
  29. 83
  30. 63
  31. 93
  32. 103
  33. 91
  34. 138
  35. 86
  36. 109
  37. 125
  38. 90
  39. 80
  40. 51

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