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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 571 · 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. 1.64 + 26 =
  2. 2.41 + 41 =
  3. 3.79 + 15 =
  4. 4.39 + 16 =
  5. 5.25 + 13 =
  6. 6.39 + 31 =
  7. 7.63 + 23 =
  8. 8.73 + 12 =
  9. 9.52 + 81 =
  10. 10.38 + 71 =
  11. 11.31 + 35 =
  12. 12.42 + 75 =
  13. 13.80 + 53 =
  14. 14.21 + 71 =
  15. 15.66 + 26 =
  16. 16.21 + 59 =
  17. 17.78 + 31 =
  18. 18.33 + 32 =
  19. 19.66 + 57 =
  20. 20.23 + 68 =
  21. 21.87 + 61 =
  22. 22.54 + 23 =
  23. 23.23 + 31 =
  24. 24.79 + 42 =
  25. 25.56 + 31 =
  26. 26.29 + 19 =
  27. 27.54 + 73 =
  28. 28.59 + 77 =
  29. 29.82 + 71 =
  30. 30.23 + 77 =
  31. 31.49 + 61 =
  32. 32.71 + 62 =
  33. 33.31 + 39 =
  34. 34.52 + 82 =
  35. 35.49 + 42 =
  36. 36.48 + 56 =
  37. 37.47 + 51 =
  38. 38.31 + 51 =
  39. 39.22 + 14 =
  40. 40.65 + 39 =

Answer key

  1. 90
  2. 82
  3. 94
  4. 55
  5. 38
  6. 70
  7. 86
  8. 85
  9. 133
  10. 109
  11. 66
  12. 117
  13. 133
  14. 92
  15. 92
  16. 80
  17. 109
  18. 65
  19. 123
  20. 91
  21. 148
  22. 77
  23. 54
  24. 121
  25. 87
  26. 48
  27. 127
  28. 136
  29. 153
  30. 100
  31. 110
  32. 133
  33. 70
  34. 134
  35. 91
  36. 104
  37. 98
  38. 82
  39. 36
  40. 104

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