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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 927 · 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. 1.47 + 15 =
  2. 2.35 + 68 =
  3. 3.51 + 42 =
  4. 4.52 + 68 =
  5. 5.44 + 59 =
  6. 6.28 + 68 =
  7. 7.29 + 62 =
  8. 8.87 + 82 =
  9. 9.30 + 41 =
  10. 10.24 + 31 =
  11. 11.44 + 66 =
  12. 12.40 + 71 =
  13. 13.30 + 53 =
  14. 14.29 + 31 =
  15. 15.34 + 51 =
  16. 16.42 + 81 =
  17. 17.61 + 31 =
  18. 18.45 + 57 =
  19. 19.36 + 51 =
  20. 20.88 + 83 =
  21. 21.31 + 12 =
  22. 22.46 + 32 =
  23. 23.68 + 61 =
  24. 24.88 + 58 =
  25. 25.49 + 41 =
  26. 26.41 + 55 =
  27. 27.43 + 47 =
  28. 28.76 + 84 =
  29. 29.72 + 31 =
  30. 30.68 + 49 =
  31. 31.51 + 86 =
  32. 32.51 + 44 =
  33. 33.30 + 78 =
  34. 34.26 + 15 =
  35. 35.87 + 46 =
  36. 36.42 + 29 =
  37. 37.55 + 85 =
  38. 38.31 + 21 =
  39. 39.78 + 33 =
  40. 40.39 + 52 =

Answer key

  1. 62
  2. 103
  3. 93
  4. 120
  5. 103
  6. 96
  7. 91
  8. 169
  9. 71
  10. 55
  11. 110
  12. 111
  13. 83
  14. 60
  15. 85
  16. 123
  17. 92
  18. 102
  19. 87
  20. 171
  21. 43
  22. 78
  23. 129
  24. 146
  25. 90
  26. 96
  27. 90
  28. 160
  29. 103
  30. 117
  31. 137
  32. 95
  33. 108
  34. 41
  35. 133
  36. 71
  37. 140
  38. 52
  39. 111
  40. 91

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