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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 547 · 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. 1.75 + 28 =
  2. 2.36 + 25 =
  3. 3.52 + 12 =
  4. 4.68 + 47 =
  5. 5.79 + 61 =
  6. 6.75 + 31 =
  7. 7.68 + 33 =
  8. 8.42 + 48 =
  9. 9.85 + 33 =
  10. 10.87 + 83 =
  11. 11.33 + 38 =
  12. 12.60 + 73 =
  13. 13.46 + 18 =
  14. 14.70 + 71 =
  15. 15.29 + 44 =
  16. 16.78 + 73 =
  17. 17.69 + 18 =
  18. 18.32 + 82 =
  19. 19.47 + 64 =
  20. 20.30 + 16 =
  21. 21.54 + 22 =
  22. 22.41 + 18 =
  23. 23.32 + 22 =
  24. 24.59 + 21 =
  25. 25.83 + 15 =
  26. 26.31 + 47 =
  27. 27.77 + 74 =
  28. 28.43 + 29 =
  29. 29.27 + 21 =
  30. 30.22 + 88 =
  31. 31.46 + 17 =
  32. 32.31 + 71 =
  33. 33.87 + 63 =
  34. 34.63 + 75 =
  35. 35.61 + 62 =
  36. 36.49 + 49 =
  37. 37.83 + 52 =
  38. 38.36 + 28 =
  39. 39.81 + 55 =
  40. 40.78 + 25 =

Answer key

  1. 103
  2. 61
  3. 64
  4. 115
  5. 140
  6. 106
  7. 101
  8. 90
  9. 118
  10. 170
  11. 71
  12. 133
  13. 64
  14. 141
  15. 73
  16. 151
  17. 87
  18. 114
  19. 111
  20. 46
  21. 76
  22. 59
  23. 54
  24. 80
  25. 98
  26. 78
  27. 151
  28. 72
  29. 48
  30. 110
  31. 63
  32. 102
  33. 150
  34. 138
  35. 123
  36. 98
  37. 135
  38. 64
  39. 136
  40. 103

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