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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 810 · 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. 1.22 + 13 =
  2. 2.29 + 19 =
  3. 3.87 + 54 =
  4. 4.28 + 41 =
  5. 5.72 + 79 =
  6. 6.48 + 33 =
  7. 7.37 + 21 =
  8. 8.52 + 48 =
  9. 9.27 + 37 =
  10. 10.89 + 81 =
  11. 11.39 + 14 =
  12. 12.52 + 28 =
  13. 13.78 + 48 =
  14. 14.29 + 38 =
  15. 15.41 + 88 =
  16. 16.46 + 25 =
  17. 17.82 + 66 =
  18. 18.38 + 43 =
  19. 19.23 + 62 =
  20. 20.38 + 23 =
  21. 21.54 + 55 =
  22. 22.43 + 48 =
  23. 23.85 + 45 =
  24. 24.57 + 54 =
  25. 25.86 + 15 =
  26. 26.74 + 73 =
  27. 27.32 + 52 =
  28. 28.62 + 69 =
  29. 29.68 + 34 =
  30. 30.79 + 73 =
  31. 31.67 + 38 =
  32. 32.27 + 15 =
  33. 33.30 + 12 =
  34. 34.52 + 71 =
  35. 35.27 + 82 =
  36. 36.32 + 69 =
  37. 37.38 + 24 =
  38. 38.32 + 57 =
  39. 39.79 + 35 =
  40. 40.79 + 43 =

Answer key

  1. 35
  2. 48
  3. 141
  4. 69
  5. 151
  6. 81
  7. 58
  8. 100
  9. 64
  10. 170
  11. 53
  12. 80
  13. 126
  14. 67
  15. 129
  16. 71
  17. 148
  18. 81
  19. 85
  20. 61
  21. 109
  22. 91
  23. 130
  24. 111
  25. 101
  26. 147
  27. 84
  28. 131
  29. 102
  30. 152
  31. 105
  32. 42
  33. 42
  34. 123
  35. 109
  36. 101
  37. 62
  38. 89
  39. 114
  40. 122

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