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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 476 · 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. 1.81 + 22 =
  2. 2.83 + 82 =
  3. 3.34 + 21 =
  4. 4.32 + 37 =
  5. 5.53 + 68 =
  6. 6.55 + 51 =
  7. 7.28 + 51 =
  8. 8.31 + 26 =
  9. 9.71 + 68 =
  10. 10.47 + 17 =
  11. 11.22 + 47 =
  12. 12.78 + 77 =
  13. 13.34 + 39 =
  14. 14.56 + 17 =
  15. 15.85 + 54 =
  16. 16.26 + 47 =
  17. 17.66 + 21 =
  18. 18.62 + 74 =
  19. 19.67 + 79 =
  20. 20.28 + 81 =
  21. 21.67 + 75 =
  22. 22.67 + 39 =
  23. 23.48 + 63 =
  24. 24.64 + 63 =
  25. 25.47 + 86 =
  26. 26.36 + 64 =
  27. 27.75 + 61 =
  28. 28.29 + 43 =
  29. 29.31 + 65 =
  30. 30.61 + 27 =
  31. 31.72 + 86 =
  32. 32.46 + 15 =
  33. 33.53 + 52 =
  34. 34.41 + 61 =
  35. 35.44 + 34 =
  36. 36.73 + 65 =
  37. 37.53 + 39 =
  38. 38.89 + 78 =
  39. 39.31 + 13 =
  40. 40.32 + 75 =

Answer key

  1. 103
  2. 165
  3. 55
  4. 69
  5. 121
  6. 106
  7. 79
  8. 57
  9. 139
  10. 64
  11. 69
  12. 155
  13. 73
  14. 73
  15. 139
  16. 73
  17. 87
  18. 136
  19. 146
  20. 109
  21. 142
  22. 106
  23. 111
  24. 127
  25. 133
  26. 100
  27. 136
  28. 72
  29. 96
  30. 88
  31. 158
  32. 61
  33. 105
  34. 102
  35. 78
  36. 138
  37. 92
  38. 167
  39. 44
  40. 107

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