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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 974 · 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. 1.48 + 23 =
  2. 2.34 + 33 =
  3. 3.62 + 32 =
  4. 4.23 + 42 =
  5. 5.58 + 59 =
  6. 6.38 + 33 =
  7. 7.74 + 36 =
  8. 8.79 + 41 =
  9. 9.74 + 61 =
  10. 10.82 + 32 =
  11. 11.78 + 51 =
  12. 12.68 + 61 =
  13. 13.51 + 32 =
  14. 14.54 + 21 =
  15. 15.24 + 67 =
  16. 16.21 + 14 =
  17. 17.41 + 15 =
  18. 18.69 + 89 =
  19. 19.56 + 41 =
  20. 20.76 + 87 =
  21. 21.33 + 25 =
  22. 22.33 + 77 =
  23. 23.44 + 15 =
  24. 24.83 + 88 =
  25. 25.26 + 41 =
  26. 26.82 + 29 =
  27. 27.73 + 25 =
  28. 28.81 + 49 =
  29. 29.46 + 57 =
  30. 30.49 + 34 =
  31. 31.64 + 87 =
  32. 32.45 + 41 =
  33. 33.33 + 38 =
  34. 34.50 + 34 =
  35. 35.69 + 51 =
  36. 36.23 + 16 =
  37. 37.38 + 49 =
  38. 38.69 + 31 =
  39. 39.38 + 17 =
  40. 40.39 + 55 =

Answer key

  1. 71
  2. 67
  3. 94
  4. 65
  5. 117
  6. 71
  7. 110
  8. 120
  9. 135
  10. 114
  11. 129
  12. 129
  13. 83
  14. 75
  15. 91
  16. 35
  17. 56
  18. 158
  19. 97
  20. 163
  21. 58
  22. 110
  23. 59
  24. 171
  25. 67
  26. 111
  27. 98
  28. 130
  29. 103
  30. 83
  31. 151
  32. 86
  33. 71
  34. 84
  35. 120
  36. 39
  37. 87
  38. 100
  39. 55
  40. 94

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