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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 218 · 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. 1.42 + 38 =
  2. 2.64 + 74 =
  3. 3.66 + 21 =
  4. 4.28 + 27 =
  5. 5.68 + 41 =
  6. 6.59 + 31 =
  7. 7.71 + 34 =
  8. 8.32 + 12 =
  9. 9.47 + 61 =
  10. 10.79 + 58 =
  11. 11.42 + 21 =
  12. 12.47 + 18 =
  13. 13.30 + 31 =
  14. 14.57 + 67 =
  15. 15.65 + 73 =
  16. 16.62 + 51 =
  17. 17.23 + 21 =
  18. 18.38 + 47 =
  19. 19.65 + 33 =
  20. 20.68 + 24 =
  21. 21.33 + 74 =
  22. 22.55 + 49 =
  23. 23.68 + 27 =
  24. 24.37 + 31 =
  25. 25.30 + 29 =
  26. 26.63 + 26 =
  27. 27.69 + 58 =
  28. 28.69 + 66 =
  29. 29.78 + 81 =
  30. 30.24 + 68 =
  31. 31.42 + 48 =
  32. 32.34 + 56 =
  33. 33.76 + 41 =
  34. 34.49 + 54 =
  35. 35.40 + 69 =
  36. 36.45 + 58 =
  37. 37.57 + 25 =
  38. 38.45 + 74 =
  39. 39.44 + 53 =
  40. 40.42 + 32 =

Answer key

  1. 80
  2. 138
  3. 87
  4. 55
  5. 109
  6. 90
  7. 105
  8. 44
  9. 108
  10. 137
  11. 63
  12. 65
  13. 61
  14. 124
  15. 138
  16. 113
  17. 44
  18. 85
  19. 98
  20. 92
  21. 107
  22. 104
  23. 95
  24. 68
  25. 59
  26. 89
  27. 127
  28. 135
  29. 159
  30. 92
  31. 90
  32. 90
  33. 117
  34. 103
  35. 109
  36. 103
  37. 82
  38. 119
  39. 97
  40. 74

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