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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 790 · 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. 1.74 + 47 =
  2. 2.48 + 66 =
  3. 3.29 + 78 =
  4. 4.69 + 73 =
  5. 5.24 + 41 =
  6. 6.21 + 64 =
  7. 7.29 + 51 =
  8. 8.21 + 16 =
  9. 9.48 + 21 =
  10. 10.69 + 28 =
  11. 11.57 + 73 =
  12. 12.22 + 32 =
  13. 13.84 + 55 =
  14. 14.49 + 83 =
  15. 15.73 + 55 =
  16. 16.88 + 18 =
  17. 17.27 + 29 =
  18. 18.59 + 49 =
  19. 19.57 + 55 =
  20. 20.39 + 21 =
  21. 21.30 + 81 =
  22. 22.83 + 56 =
  23. 23.51 + 17 =
  24. 24.28 + 24 =
  25. 25.30 + 21 =
  26. 26.88 + 51 =
  27. 27.25 + 12 =
  28. 28.69 + 75 =
  29. 29.87 + 89 =
  30. 30.45 + 51 =
  31. 31.38 + 64 =
  32. 32.37 + 21 =
  33. 33.25 + 19 =
  34. 34.58 + 27 =
  35. 35.32 + 61 =
  36. 36.32 + 74 =
  37. 37.35 + 29 =
  38. 38.62 + 35 =
  39. 39.31 + 79 =
  40. 40.23 + 33 =

Answer key

  1. 121
  2. 114
  3. 107
  4. 142
  5. 65
  6. 85
  7. 80
  8. 37
  9. 69
  10. 97
  11. 130
  12. 54
  13. 139
  14. 132
  15. 128
  16. 106
  17. 56
  18. 108
  19. 112
  20. 60
  21. 111
  22. 139
  23. 68
  24. 52
  25. 51
  26. 139
  27. 37
  28. 144
  29. 176
  30. 96
  31. 102
  32. 58
  33. 44
  34. 85
  35. 93
  36. 106
  37. 64
  38. 97
  39. 110
  40. 56

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