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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 717 · 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 + 67 =
  2. 2.42 + 75 =
  3. 3.77 + 45 =
  4. 4.66 + 77 =
  5. 5.68 + 82 =
  6. 6.87 + 54 =
  7. 7.83 + 19 =
  8. 8.43 + 43 =
  9. 9.29 + 78 =
  10. 10.47 + 61 =
  11. 11.24 + 46 =
  12. 12.49 + 42 =
  13. 13.57 + 78 =
  14. 14.43 + 42 =
  15. 15.87 + 14 =
  16. 16.74 + 21 =
  17. 17.79 + 77 =
  18. 18.61 + 14 =
  19. 19.74 + 67 =
  20. 20.26 + 39 =
  21. 21.29 + 47 =
  22. 22.71 + 24 =
  23. 23.48 + 19 =
  24. 24.87 + 46 =
  25. 25.27 + 12 =
  26. 26.61 + 52 =
  27. 27.61 + 54 =
  28. 28.72 + 25 =
  29. 29.72 + 51 =
  30. 30.88 + 48 =
  31. 31.22 + 48 =
  32. 32.24 + 81 =
  33. 33.25 + 27 =
  34. 34.23 + 64 =
  35. 35.25 + 34 =
  36. 36.69 + 75 =
  37. 37.24 + 41 =
  38. 38.59 + 18 =
  39. 39.44 + 27 =
  40. 40.41 + 74 =

Answer key

  1. 148
  2. 117
  3. 122
  4. 143
  5. 150
  6. 141
  7. 102
  8. 86
  9. 107
  10. 108
  11. 70
  12. 91
  13. 135
  14. 85
  15. 101
  16. 95
  17. 156
  18. 75
  19. 141
  20. 65
  21. 76
  22. 95
  23. 67
  24. 133
  25. 39
  26. 113
  27. 115
  28. 97
  29. 123
  30. 136
  31. 70
  32. 105
  33. 52
  34. 87
  35. 59
  36. 144
  37. 65
  38. 77
  39. 71
  40. 115

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