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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 265 · 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 + 84 =
  2. 2.81 + 36 =
  3. 3.69 + 17 =
  4. 4.44 + 39 =
  5. 5.62 + 66 =
  6. 6.87 + 23 =
  7. 7.39 + 57 =
  8. 8.39 + 76 =
  9. 9.71 + 24 =
  10. 10.60 + 37 =
  11. 11.29 + 82 =
  12. 12.28 + 63 =
  13. 13.43 + 18 =
  14. 14.79 + 37 =
  15. 15.83 + 48 =
  16. 16.26 + 65 =
  17. 17.26 + 33 =
  18. 18.55 + 41 =
  19. 19.78 + 61 =
  20. 20.36 + 16 =
  21. 21.46 + 71 =
  22. 22.23 + 13 =
  23. 23.57 + 52 =
  24. 24.73 + 54 =
  25. 25.54 + 27 =
  26. 26.68 + 18 =
  27. 27.46 + 41 =
  28. 28.88 + 27 =
  29. 29.61 + 84 =
  30. 30.81 + 68 =
  31. 31.76 + 23 =
  32. 32.30 + 82 =
  33. 33.26 + 12 =
  34. 34.68 + 31 =
  35. 35.27 + 38 =
  36. 36.54 + 79 =
  37. 37.68 + 59 =
  38. 38.67 + 77 =
  39. 39.74 + 21 =
  40. 40.30 + 24 =

Answer key

  1. 148
  2. 117
  3. 86
  4. 83
  5. 128
  6. 110
  7. 96
  8. 115
  9. 95
  10. 97
  11. 111
  12. 91
  13. 61
  14. 116
  15. 131
  16. 91
  17. 59
  18. 96
  19. 139
  20. 52
  21. 117
  22. 36
  23. 109
  24. 127
  25. 81
  26. 86
  27. 87
  28. 115
  29. 145
  30. 149
  31. 99
  32. 112
  33. 38
  34. 99
  35. 65
  36. 133
  37. 127
  38. 144
  39. 95
  40. 54

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