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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 681 · 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. 1.35 + 61 =
  2. 2.82 + 18 =
  3. 3.72 + 81 =
  4. 4.23 + 81 =
  5. 5.50 + 32 =
  6. 6.67 + 47 =
  7. 7.25 + 56 =
  8. 8.49 + 13 =
  9. 9.36 + 17 =
  10. 10.50 + 61 =
  11. 11.33 + 43 =
  12. 12.23 + 29 =
  13. 13.42 + 15 =
  14. 14.62 + 82 =
  15. 15.47 + 84 =
  16. 16.32 + 34 =
  17. 17.73 + 63 =
  18. 18.66 + 81 =
  19. 19.89 + 61 =
  20. 20.80 + 72 =
  21. 21.34 + 81 =
  22. 22.55 + 84 =
  23. 23.52 + 32 =
  24. 24.49 + 27 =
  25. 25.26 + 23 =
  26. 26.69 + 53 =
  27. 27.68 + 45 =
  28. 28.54 + 43 =
  29. 29.60 + 22 =
  30. 30.37 + 35 =
  31. 31.54 + 24 =
  32. 32.42 + 24 =
  33. 33.75 + 25 =
  34. 34.33 + 34 =
  35. 35.65 + 58 =
  36. 36.59 + 35 =
  37. 37.49 + 45 =
  38. 38.79 + 67 =
  39. 39.49 + 76 =
  40. 40.26 + 64 =

Answer key

  1. 96
  2. 100
  3. 153
  4. 104
  5. 82
  6. 114
  7. 81
  8. 62
  9. 53
  10. 111
  11. 76
  12. 52
  13. 57
  14. 144
  15. 131
  16. 66
  17. 136
  18. 147
  19. 150
  20. 152
  21. 115
  22. 139
  23. 84
  24. 76
  25. 49
  26. 122
  27. 113
  28. 97
  29. 82
  30. 72
  31. 78
  32. 66
  33. 100
  34. 67
  35. 123
  36. 94
  37. 94
  38. 146
  39. 125
  40. 90

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