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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 366 · 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. 1.27 + 32 =
  2. 2.31 + 57 =
  3. 3.89 + 28 =
  4. 4.54 + 36 =
  5. 5.53 + 19 =
  6. 6.76 + 56 =
  7. 7.83 + 41 =
  8. 8.27 + 24 =
  9. 9.75 + 21 =
  10. 10.38 + 58 =
  11. 11.81 + 62 =
  12. 12.72 + 35 =
  13. 13.61 + 87 =
  14. 14.78 + 75 =
  15. 15.42 + 67 =
  16. 16.25 + 32 =
  17. 17.26 + 73 =
  18. 18.27 + 14 =
  19. 19.40 + 41 =
  20. 20.35 + 52 =
  21. 21.69 + 12 =
  22. 22.31 + 65 =
  23. 23.45 + 86 =
  24. 24.23 + 28 =
  25. 25.29 + 38 =
  26. 26.81 + 51 =
  27. 27.57 + 26 =
  28. 28.71 + 61 =
  29. 29.82 + 34 =
  30. 30.73 + 24 =
  31. 31.41 + 83 =
  32. 32.67 + 22 =
  33. 33.77 + 41 =
  34. 34.89 + 49 =
  35. 35.36 + 75 =
  36. 36.52 + 26 =
  37. 37.25 + 89 =
  38. 38.86 + 66 =
  39. 39.63 + 27 =
  40. 40.46 + 52 =

Answer key

  1. 59
  2. 88
  3. 117
  4. 90
  5. 72
  6. 132
  7. 124
  8. 51
  9. 96
  10. 96
  11. 143
  12. 107
  13. 148
  14. 153
  15. 109
  16. 57
  17. 99
  18. 41
  19. 81
  20. 87
  21. 81
  22. 96
  23. 131
  24. 51
  25. 67
  26. 132
  27. 83
  28. 132
  29. 116
  30. 97
  31. 124
  32. 89
  33. 118
  34. 138
  35. 111
  36. 78
  37. 114
  38. 152
  39. 90
  40. 98

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