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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 805 · 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. 1.82 + 75 =
  2. 2.87 + 18 =
  3. 3.55 + 27 =
  4. 4.82 + 19 =
  5. 5.78 + 68 =
  6. 6.81 + 16 =
  7. 7.59 + 44 =
  8. 8.36 + 31 =
  9. 9.49 + 87 =
  10. 10.22 + 47 =
  11. 11.78 + 72 =
  12. 12.41 + 61 =
  13. 13.89 + 31 =
  14. 14.53 + 14 =
  15. 15.38 + 63 =
  16. 16.51 + 53 =
  17. 17.82 + 68 =
  18. 18.58 + 29 =
  19. 19.36 + 13 =
  20. 20.70 + 57 =
  21. 21.74 + 42 =
  22. 22.83 + 22 =
  23. 23.28 + 83 =
  24. 24.33 + 51 =
  25. 25.57 + 37 =
  26. 26.49 + 85 =
  27. 27.29 + 51 =
  28. 28.30 + 48 =
  29. 29.76 + 38 =
  30. 30.73 + 25 =
  31. 31.44 + 62 =
  32. 32.23 + 37 =
  33. 33.24 + 29 =
  34. 34.84 + 75 =
  35. 35.55 + 57 =
  36. 36.84 + 43 =
  37. 37.32 + 82 =
  38. 38.58 + 12 =
  39. 39.66 + 26 =
  40. 40.81 + 21 =

Answer key

  1. 157
  2. 105
  3. 82
  4. 101
  5. 146
  6. 97
  7. 103
  8. 67
  9. 136
  10. 69
  11. 150
  12. 102
  13. 120
  14. 67
  15. 101
  16. 104
  17. 150
  18. 87
  19. 49
  20. 127
  21. 116
  22. 105
  23. 111
  24. 84
  25. 94
  26. 134
  27. 80
  28. 78
  29. 114
  30. 98
  31. 106
  32. 60
  33. 53
  34. 159
  35. 112
  36. 127
  37. 114
  38. 70
  39. 92
  40. 102

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