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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 205 · 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. 1.21 + 81 =
  2. 2.69 + 32 =
  3. 3.59 + 26 =
  4. 4.28 + 67 =
  5. 5.26 + 19 =
  6. 6.62 + 35 =
  7. 7.48 + 41 =
  8. 8.38 + 79 =
  9. 9.62 + 19 =
  10. 10.29 + 32 =
  11. 11.46 + 42 =
  12. 12.36 + 22 =
  13. 13.60 + 55 =
  14. 14.73 + 67 =
  15. 15.43 + 22 =
  16. 16.31 + 57 =
  17. 17.41 + 58 =
  18. 18.35 + 33 =
  19. 19.73 + 22 =
  20. 20.78 + 38 =
  21. 21.25 + 66 =
  22. 22.72 + 38 =
  23. 23.60 + 46 =
  24. 24.74 + 53 =
  25. 25.51 + 46 =
  26. 26.29 + 23 =
  27. 27.31 + 62 =
  28. 28.40 + 88 =
  29. 29.87 + 42 =
  30. 30.27 + 44 =
  31. 31.54 + 34 =
  32. 32.67 + 26 =
  33. 33.57 + 56 =
  34. 34.23 + 21 =
  35. 35.82 + 26 =
  36. 36.39 + 77 =
  37. 37.30 + 41 =
  38. 38.62 + 43 =
  39. 39.32 + 54 =
  40. 40.30 + 26 =

Answer key

  1. 102
  2. 101
  3. 85
  4. 95
  5. 45
  6. 97
  7. 89
  8. 117
  9. 81
  10. 61
  11. 88
  12. 58
  13. 115
  14. 140
  15. 65
  16. 88
  17. 99
  18. 68
  19. 95
  20. 116
  21. 91
  22. 110
  23. 106
  24. 127
  25. 97
  26. 52
  27. 93
  28. 128
  29. 129
  30. 71
  31. 88
  32. 93
  33. 113
  34. 44
  35. 108
  36. 116
  37. 71
  38. 105
  39. 86
  40. 56

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