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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 491 · 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. 1.69 + 21 =
  2. 2.22 + 87 =
  3. 3.46 + 33 =
  4. 4.75 + 58 =
  5. 5.83 + 88 =
  6. 6.75 + 51 =
  7. 7.62 + 68 =
  8. 8.23 + 59 =
  9. 9.57 + 18 =
  10. 10.58 + 86 =
  11. 11.79 + 89 =
  12. 12.34 + 34 =
  13. 13.52 + 24 =
  14. 14.79 + 81 =
  15. 15.61 + 26 =
  16. 16.39 + 41 =
  17. 17.49 + 19 =
  18. 18.29 + 82 =
  19. 19.39 + 61 =
  20. 20.25 + 41 =
  21. 21.75 + 62 =
  22. 22.35 + 18 =
  23. 23.31 + 79 =
  24. 24.24 + 45 =
  25. 25.21 + 31 =
  26. 26.61 + 19 =
  27. 27.80 + 78 =
  28. 28.28 + 44 =
  29. 29.33 + 28 =
  30. 30.79 + 41 =
  31. 31.74 + 19 =
  32. 32.66 + 17 =
  33. 33.84 + 28 =
  34. 34.39 + 88 =
  35. 35.44 + 51 =
  36. 36.34 + 54 =
  37. 37.39 + 26 =
  38. 38.39 + 12 =
  39. 39.55 + 87 =
  40. 40.51 + 33 =

Answer key

  1. 90
  2. 109
  3. 79
  4. 133
  5. 171
  6. 126
  7. 130
  8. 82
  9. 75
  10. 144
  11. 168
  12. 68
  13. 76
  14. 160
  15. 87
  16. 80
  17. 68
  18. 111
  19. 100
  20. 66
  21. 137
  22. 53
  23. 110
  24. 69
  25. 52
  26. 80
  27. 158
  28. 72
  29. 61
  30. 120
  31. 93
  32. 83
  33. 112
  34. 127
  35. 95
  36. 88
  37. 65
  38. 51
  39. 142
  40. 84

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