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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 59 · 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. 1.27 + 42 =
  2. 2.79 + 79 =
  3. 3.39 + 26 =
  4. 4.85 + 74 =
  5. 5.70 + 21 =
  6. 6.79 + 31 =
  7. 7.89 + 76 =
  8. 8.22 + 81 =
  9. 9.26 + 38 =
  10. 10.21 + 44 =
  11. 11.32 + 68 =
  12. 12.47 + 51 =
  13. 13.74 + 52 =
  14. 14.46 + 54 =
  15. 15.65 + 31 =
  16. 16.62 + 37 =
  17. 17.87 + 23 =
  18. 18.40 + 21 =
  19. 19.83 + 41 =
  20. 20.21 + 52 =
  21. 21.49 + 14 =
  22. 22.48 + 22 =
  23. 23.31 + 19 =
  24. 24.37 + 87 =
  25. 25.22 + 82 =
  26. 26.62 + 22 =
  27. 27.78 + 83 =
  28. 28.43 + 26 =
  29. 29.77 + 22 =
  30. 30.81 + 16 =
  31. 31.31 + 56 =
  32. 32.36 + 68 =
  33. 33.54 + 33 =
  34. 34.40 + 14 =
  35. 35.28 + 14 =
  36. 36.43 + 19 =
  37. 37.28 + 18 =
  38. 38.40 + 71 =
  39. 39.37 + 41 =
  40. 40.31 + 21 =

Answer key

  1. 69
  2. 158
  3. 65
  4. 159
  5. 91
  6. 110
  7. 165
  8. 103
  9. 64
  10. 65
  11. 100
  12. 98
  13. 126
  14. 100
  15. 96
  16. 99
  17. 110
  18. 61
  19. 124
  20. 73
  21. 63
  22. 70
  23. 50
  24. 124
  25. 104
  26. 84
  27. 161
  28. 69
  29. 99
  30. 97
  31. 87
  32. 104
  33. 87
  34. 54
  35. 42
  36. 62
  37. 46
  38. 111
  39. 78
  40. 52

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