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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 414 · 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. 1.57 + 23 =
  2. 2.21 + 88 =
  3. 3.74 + 17 =
  4. 4.82 + 56 =
  5. 5.83 + 32 =
  6. 6.26 + 64 =
  7. 7.40 + 61 =
  8. 8.89 + 47 =
  9. 9.30 + 41 =
  10. 10.82 + 63 =
  11. 11.82 + 47 =
  12. 12.23 + 82 =
  13. 13.46 + 43 =
  14. 14.40 + 21 =
  15. 15.78 + 88 =
  16. 16.54 + 18 =
  17. 17.61 + 44 =
  18. 18.56 + 78 =
  19. 19.88 + 26 =
  20. 20.59 + 39 =
  21. 21.32 + 47 =
  22. 22.41 + 26 =
  23. 23.31 + 49 =
  24. 24.68 + 16 =
  25. 25.22 + 85 =
  26. 26.82 + 42 =
  27. 27.43 + 23 =
  28. 28.76 + 36 =
  29. 29.27 + 81 =
  30. 30.78 + 33 =
  31. 31.37 + 63 =
  32. 32.84 + 49 =
  33. 33.65 + 14 =
  34. 34.33 + 75 =
  35. 35.41 + 38 =
  36. 36.64 + 46 =
  37. 37.74 + 56 =
  38. 38.77 + 52 =
  39. 39.25 + 12 =
  40. 40.21 + 79 =

Answer key

  1. 80
  2. 109
  3. 91
  4. 138
  5. 115
  6. 90
  7. 101
  8. 136
  9. 71
  10. 145
  11. 129
  12. 105
  13. 89
  14. 61
  15. 166
  16. 72
  17. 105
  18. 134
  19. 114
  20. 98
  21. 79
  22. 67
  23. 80
  24. 84
  25. 107
  26. 124
  27. 66
  28. 112
  29. 108
  30. 111
  31. 100
  32. 133
  33. 79
  34. 108
  35. 79
  36. 110
  37. 130
  38. 129
  39. 37
  40. 100

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