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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 445 · 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. 1.51 + 34 =
  2. 2.24 + 41 =
  3. 3.21 + 56 =
  4. 4.35 + 16 =
  5. 5.31 + 83 =
  6. 6.74 + 18 =
  7. 7.75 + 17 =
  8. 8.58 + 43 =
  9. 9.49 + 59 =
  10. 10.47 + 28 =
  11. 11.38 + 32 =
  12. 12.34 + 69 =
  13. 13.38 + 39 =
  14. 14.35 + 25 =
  15. 15.21 + 37 =
  16. 16.84 + 41 =
  17. 17.29 + 39 =
  18. 18.62 + 18 =
  19. 19.83 + 57 =
  20. 20.82 + 71 =
  21. 21.86 + 43 =
  22. 22.48 + 74 =
  23. 23.24 + 74 =
  24. 24.27 + 26 =
  25. 25.32 + 33 =
  26. 26.73 + 36 =
  27. 27.31 + 31 =
  28. 28.76 + 45 =
  29. 29.33 + 34 =
  30. 30.41 + 56 =
  31. 31.64 + 18 =
  32. 32.83 + 89 =
  33. 33.36 + 61 =
  34. 34.72 + 78 =
  35. 35.87 + 39 =
  36. 36.46 + 64 =
  37. 37.76 + 33 =
  38. 38.38 + 71 =
  39. 39.83 + 42 =
  40. 40.69 + 87 =

Answer key

  1. 85
  2. 65
  3. 77
  4. 51
  5. 114
  6. 92
  7. 92
  8. 101
  9. 108
  10. 75
  11. 70
  12. 103
  13. 77
  14. 60
  15. 58
  16. 125
  17. 68
  18. 80
  19. 140
  20. 153
  21. 129
  22. 122
  23. 98
  24. 53
  25. 65
  26. 109
  27. 62
  28. 121
  29. 67
  30. 97
  31. 82
  32. 172
  33. 97
  34. 150
  35. 126
  36. 110
  37. 109
  38. 109
  39. 125
  40. 156

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