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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 172 · 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. 1.29 + 81 =
  2. 2.72 + 51 =
  3. 3.61 + 72 =
  4. 4.65 + 85 =
  5. 5.39 + 53 =
  6. 6.31 + 51 =
  7. 7.59 + 31 =
  8. 8.27 + 42 =
  9. 9.26 + 19 =
  10. 10.72 + 59 =
  11. 11.87 + 81 =
  12. 12.27 + 59 =
  13. 13.84 + 52 =
  14. 14.49 + 86 =
  15. 15.49 + 23 =
  16. 16.70 + 53 =
  17. 17.23 + 87 =
  18. 18.37 + 81 =
  19. 19.72 + 52 =
  20. 20.50 + 57 =
  21. 21.76 + 46 =
  22. 22.78 + 21 =
  23. 23.72 + 32 =
  24. 24.36 + 13 =
  25. 25.21 + 86 =
  26. 26.60 + 28 =
  27. 27.25 + 84 =
  28. 28.64 + 16 =
  29. 29.35 + 13 =
  30. 30.49 + 76 =
  31. 31.54 + 33 =
  32. 32.70 + 13 =
  33. 33.62 + 49 =
  34. 34.30 + 64 =
  35. 35.29 + 63 =
  36. 36.32 + 83 =
  37. 37.82 + 24 =
  38. 38.52 + 61 =
  39. 39.53 + 69 =
  40. 40.85 + 25 =

Answer key

  1. 110
  2. 123
  3. 133
  4. 150
  5. 92
  6. 82
  7. 90
  8. 69
  9. 45
  10. 131
  11. 168
  12. 86
  13. 136
  14. 135
  15. 72
  16. 123
  17. 110
  18. 118
  19. 124
  20. 107
  21. 122
  22. 99
  23. 104
  24. 49
  25. 107
  26. 88
  27. 109
  28. 80
  29. 48
  30. 125
  31. 87
  32. 83
  33. 111
  34. 94
  35. 92
  36. 115
  37. 106
  38. 113
  39. 122
  40. 110

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