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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 539 · 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. 1.21 + 47 =
  2. 2.31 + 71 =
  3. 3.23 + 86 =
  4. 4.29 + 83 =
  5. 5.71 + 26 =
  6. 6.52 + 51 =
  7. 7.44 + 63 =
  8. 8.77 + 43 =
  9. 9.81 + 69 =
  10. 10.39 + 13 =
  11. 11.27 + 68 =
  12. 12.58 + 73 =
  13. 13.51 + 32 =
  14. 14.82 + 29 =
  15. 15.52 + 63 =
  16. 16.30 + 64 =
  17. 17.30 + 53 =
  18. 18.61 + 33 =
  19. 19.31 + 17 =
  20. 20.58 + 29 =
  21. 21.42 + 37 =
  22. 22.53 + 74 =
  23. 23.32 + 53 =
  24. 24.73 + 12 =
  25. 25.29 + 81 =
  26. 26.85 + 27 =
  27. 27.28 + 18 =
  28. 28.78 + 25 =
  29. 29.74 + 57 =
  30. 30.43 + 63 =
  31. 31.23 + 85 =
  32. 32.55 + 29 =
  33. 33.42 + 17 =
  34. 34.32 + 24 =
  35. 35.49 + 87 =
  36. 36.53 + 34 =
  37. 37.36 + 31 =
  38. 38.80 + 47 =
  39. 39.52 + 55 =
  40. 40.53 + 24 =

Answer key

  1. 68
  2. 102
  3. 109
  4. 112
  5. 97
  6. 103
  7. 107
  8. 120
  9. 150
  10. 52
  11. 95
  12. 131
  13. 83
  14. 111
  15. 115
  16. 94
  17. 83
  18. 94
  19. 48
  20. 87
  21. 79
  22. 127
  23. 85
  24. 85
  25. 110
  26. 112
  27. 46
  28. 103
  29. 131
  30. 106
  31. 108
  32. 84
  33. 59
  34. 56
  35. 136
  36. 87
  37. 67
  38. 127
  39. 107
  40. 77

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