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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 614 · 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 + 72 =
  2. 2.58 + 14 =
  3. 3.31 + 81 =
  4. 4.27 + 48 =
  5. 5.39 + 24 =
  6. 6.87 + 41 =
  7. 7.35 + 26 =
  8. 8.37 + 49 =
  9. 9.25 + 12 =
  10. 10.65 + 38 =
  11. 11.22 + 85 =
  12. 12.87 + 33 =
  13. 13.46 + 61 =
  14. 14.66 + 18 =
  15. 15.34 + 51 =
  16. 16.78 + 36 =
  17. 17.52 + 78 =
  18. 18.64 + 83 =
  19. 19.83 + 47 =
  20. 20.77 + 26 =
  21. 21.39 + 28 =
  22. 22.52 + 48 =
  23. 23.70 + 24 =
  24. 24.27 + 84 =
  25. 25.74 + 32 =
  26. 26.40 + 48 =
  27. 27.45 + 44 =
  28. 28.31 + 32 =
  29. 29.34 + 25 =
  30. 30.52 + 35 =
  31. 31.29 + 67 =
  32. 32.75 + 41 =
  33. 33.61 + 72 =
  34. 34.76 + 36 =
  35. 35.68 + 65 =
  36. 36.68 + 73 =
  37. 37.52 + 69 =
  38. 38.71 + 13 =
  39. 39.69 + 31 =
  40. 40.58 + 82 =

Answer key

  1. 121
  2. 72
  3. 112
  4. 75
  5. 63
  6. 128
  7. 61
  8. 86
  9. 37
  10. 103
  11. 107
  12. 120
  13. 107
  14. 84
  15. 85
  16. 114
  17. 130
  18. 147
  19. 130
  20. 103
  21. 67
  22. 100
  23. 94
  24. 111
  25. 106
  26. 88
  27. 89
  28. 63
  29. 59
  30. 87
  31. 96
  32. 116
  33. 133
  34. 112
  35. 133
  36. 141
  37. 121
  38. 84
  39. 100
  40. 140

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