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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 372 · 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. 1.78 + 32 =
  2. 2.43 + 23 =
  3. 3.45 + 15 =
  4. 4.41 + 46 =
  5. 5.32 + 86 =
  6. 6.60 + 21 =
  7. 7.35 + 17 =
  8. 8.89 + 65 =
  9. 9.41 + 69 =
  10. 10.37 + 62 =
  11. 11.26 + 32 =
  12. 12.89 + 84 =
  13. 13.77 + 28 =
  14. 14.87 + 22 =
  15. 15.77 + 58 =
  16. 16.69 + 57 =
  17. 17.32 + 22 =
  18. 18.28 + 27 =
  19. 19.23 + 15 =
  20. 20.74 + 58 =
  21. 21.59 + 71 =
  22. 22.54 + 68 =
  23. 23.67 + 26 =
  24. 24.83 + 33 =
  25. 25.32 + 21 =
  26. 26.57 + 53 =
  27. 27.58 + 43 =
  28. 28.71 + 28 =
  29. 29.35 + 61 =
  30. 30.68 + 31 =
  31. 31.37 + 14 =
  32. 32.59 + 83 =
  33. 33.26 + 25 =
  34. 34.75 + 45 =
  35. 35.68 + 58 =
  36. 36.66 + 18 =
  37. 37.34 + 76 =
  38. 38.87 + 24 =
  39. 39.28 + 26 =
  40. 40.22 + 17 =

Answer key

  1. 110
  2. 66
  3. 60
  4. 87
  5. 118
  6. 81
  7. 52
  8. 154
  9. 110
  10. 99
  11. 58
  12. 173
  13. 105
  14. 109
  15. 135
  16. 126
  17. 54
  18. 55
  19. 38
  20. 132
  21. 130
  22. 122
  23. 93
  24. 116
  25. 53
  26. 110
  27. 101
  28. 99
  29. 96
  30. 99
  31. 51
  32. 142
  33. 51
  34. 120
  35. 126
  36. 84
  37. 110
  38. 111
  39. 54
  40. 39

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