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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 727 · 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. 1.89 + 61 =
  2. 2.89 + 32 =
  3. 3.37 + 56 =
  4. 4.36 + 47 =
  5. 5.46 + 81 =
  6. 6.82 + 75 =
  7. 7.23 + 74 =
  8. 8.88 + 33 =
  9. 9.82 + 72 =
  10. 10.40 + 27 =
  11. 11.25 + 12 =
  12. 12.58 + 85 =
  13. 13.76 + 64 =
  14. 14.31 + 88 =
  15. 15.68 + 19 =
  16. 16.44 + 31 =
  17. 17.28 + 58 =
  18. 18.75 + 41 =
  19. 19.52 + 21 =
  20. 20.30 + 39 =
  21. 21.28 + 89 =
  22. 22.36 + 69 =
  23. 23.33 + 21 =
  24. 24.24 + 44 =
  25. 25.56 + 43 =
  26. 26.79 + 84 =
  27. 27.37 + 39 =
  28. 28.73 + 65 =
  29. 29.78 + 17 =
  30. 30.24 + 26 =
  31. 31.34 + 33 =
  32. 32.29 + 84 =
  33. 33.78 + 22 =
  34. 34.55 + 35 =
  35. 35.66 + 87 =
  36. 36.36 + 89 =
  37. 37.83 + 37 =
  38. 38.53 + 59 =
  39. 39.26 + 77 =
  40. 40.23 + 55 =

Answer key

  1. 150
  2. 121
  3. 93
  4. 83
  5. 127
  6. 157
  7. 97
  8. 121
  9. 154
  10. 67
  11. 37
  12. 143
  13. 140
  14. 119
  15. 87
  16. 75
  17. 86
  18. 116
  19. 73
  20. 69
  21. 117
  22. 105
  23. 54
  24. 68
  25. 99
  26. 163
  27. 76
  28. 138
  29. 95
  30. 50
  31. 67
  32. 113
  33. 100
  34. 90
  35. 153
  36. 125
  37. 120
  38. 112
  39. 103
  40. 78

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