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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 455 · 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. 1.36 + 66 =
  2. 2.77 + 68 =
  3. 3.21 + 73 =
  4. 4.76 + 19 =
  5. 5.30 + 65 =
  6. 6.76 + 26 =
  7. 7.88 + 44 =
  8. 8.68 + 43 =
  9. 9.62 + 35 =
  10. 10.21 + 44 =
  11. 11.31 + 22 =
  12. 12.65 + 58 =
  13. 13.81 + 67 =
  14. 14.79 + 72 =
  15. 15.82 + 61 =
  16. 16.23 + 61 =
  17. 17.67 + 32 =
  18. 18.29 + 64 =
  19. 19.70 + 26 =
  20. 20.76 + 29 =
  21. 21.27 + 34 =
  22. 22.64 + 16 =
  23. 23.73 + 54 =
  24. 24.40 + 13 =
  25. 25.41 + 54 =
  26. 26.33 + 62 =
  27. 27.36 + 64 =
  28. 28.45 + 32 =
  29. 29.61 + 38 =
  30. 30.37 + 32 =
  31. 31.67 + 44 =
  32. 32.74 + 68 =
  33. 33.33 + 83 =
  34. 34.26 + 87 =
  35. 35.65 + 24 =
  36. 36.31 + 12 =
  37. 37.81 + 85 =
  38. 38.89 + 28 =
  39. 39.37 + 24 =
  40. 40.78 + 27 =

Answer key

  1. 102
  2. 145
  3. 94
  4. 95
  5. 95
  6. 102
  7. 132
  8. 111
  9. 97
  10. 65
  11. 53
  12. 123
  13. 148
  14. 151
  15. 143
  16. 84
  17. 99
  18. 93
  19. 96
  20. 105
  21. 61
  22. 80
  23. 127
  24. 53
  25. 95
  26. 95
  27. 100
  28. 77
  29. 99
  30. 69
  31. 111
  32. 142
  33. 116
  34. 113
  35. 89
  36. 43
  37. 166
  38. 117
  39. 61
  40. 105

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