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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 572 · 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. 1.46 + 57 =
  2. 2.47 + 73 =
  3. 3.40 + 22 =
  4. 4.37 + 83 =
  5. 5.39 + 55 =
  6. 6.74 + 32 =
  7. 7.57 + 71 =
  8. 8.49 + 69 =
  9. 9.28 + 44 =
  10. 10.38 + 46 =
  11. 11.55 + 74 =
  12. 12.30 + 71 =
  13. 13.42 + 55 =
  14. 14.44 + 26 =
  15. 15.66 + 37 =
  16. 16.27 + 78 =
  17. 17.28 + 71 =
  18. 18.66 + 81 =
  19. 19.47 + 35 =
  20. 20.33 + 54 =
  21. 21.78 + 43 =
  22. 22.69 + 35 =
  23. 23.40 + 32 =
  24. 24.45 + 81 =
  25. 25.25 + 57 =
  26. 26.85 + 38 =
  27. 27.25 + 16 =
  28. 28.52 + 81 =
  29. 29.52 + 35 =
  30. 30.88 + 21 =
  31. 31.23 + 64 =
  32. 32.85 + 85 =
  33. 33.36 + 66 =
  34. 34.38 + 13 =
  35. 35.47 + 12 =
  36. 36.61 + 82 =
  37. 37.31 + 65 =
  38. 38.61 + 12 =
  39. 39.24 + 17 =
  40. 40.52 + 73 =

Answer key

  1. 103
  2. 120
  3. 62
  4. 120
  5. 94
  6. 106
  7. 128
  8. 118
  9. 72
  10. 84
  11. 129
  12. 101
  13. 97
  14. 70
  15. 103
  16. 105
  17. 99
  18. 147
  19. 82
  20. 87
  21. 121
  22. 104
  23. 72
  24. 126
  25. 82
  26. 123
  27. 41
  28. 133
  29. 87
  30. 109
  31. 87
  32. 170
  33. 102
  34. 51
  35. 59
  36. 143
  37. 96
  38. 73
  39. 41
  40. 125

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