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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 683 · 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. 1.49 + 54 =
  2. 2.71 + 62 =
  3. 3.27 + 15 =
  4. 4.52 + 61 =
  5. 5.75 + 33 =
  6. 6.69 + 73 =
  7. 7.40 + 78 =
  8. 8.38 + 48 =
  9. 9.57 + 16 =
  10. 10.36 + 57 =
  11. 11.42 + 16 =
  12. 12.24 + 41 =
  13. 13.46 + 12 =
  14. 14.21 + 83 =
  15. 15.34 + 42 =
  16. 16.84 + 68 =
  17. 17.41 + 42 =
  18. 18.75 + 79 =
  19. 19.21 + 14 =
  20. 20.45 + 36 =
  21. 21.84 + 39 =
  22. 22.48 + 58 =
  23. 23.66 + 48 =
  24. 24.59 + 26 =
  25. 25.26 + 51 =
  26. 26.38 + 31 =
  27. 27.34 + 41 =
  28. 28.30 + 64 =
  29. 29.30 + 52 =
  30. 30.25 + 83 =
  31. 31.41 + 49 =
  32. 32.53 + 82 =
  33. 33.81 + 32 =
  34. 34.87 + 48 =
  35. 35.87 + 33 =
  36. 36.76 + 73 =
  37. 37.84 + 32 =
  38. 38.32 + 49 =
  39. 39.39 + 89 =
  40. 40.29 + 81 =

Answer key

  1. 103
  2. 133
  3. 42
  4. 113
  5. 108
  6. 142
  7. 118
  8. 86
  9. 73
  10. 93
  11. 58
  12. 65
  13. 58
  14. 104
  15. 76
  16. 152
  17. 83
  18. 154
  19. 35
  20. 81
  21. 123
  22. 106
  23. 114
  24. 85
  25. 77
  26. 69
  27. 75
  28. 94
  29. 82
  30. 108
  31. 90
  32. 135
  33. 113
  34. 135
  35. 120
  36. 149
  37. 116
  38. 81
  39. 128
  40. 110

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