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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 53 · 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. 1.41 + 18 =
  2. 2.31 + 45 =
  3. 3.68 + 77 =
  4. 4.50 + 28 =
  5. 5.68 + 39 =
  6. 6.87 + 57 =
  7. 7.76 + 69 =
  8. 8.85 + 49 =
  9. 9.30 + 39 =
  10. 10.26 + 18 =
  11. 11.49 + 67 =
  12. 12.82 + 68 =
  13. 13.34 + 25 =
  14. 14.50 + 81 =
  15. 15.87 + 56 =
  16. 16.33 + 42 =
  17. 17.42 + 39 =
  18. 18.55 + 81 =
  19. 19.35 + 28 =
  20. 20.60 + 71 =
  21. 21.66 + 54 =
  22. 22.84 + 59 =
  23. 23.60 + 21 =
  24. 24.39 + 14 =
  25. 25.30 + 24 =
  26. 26.65 + 27 =
  27. 27.73 + 61 =
  28. 28.44 + 29 =
  29. 29.24 + 21 =
  30. 30.64 + 88 =
  31. 31.65 + 84 =
  32. 32.49 + 66 =
  33. 33.72 + 79 =
  34. 34.76 + 82 =
  35. 35.47 + 69 =
  36. 36.56 + 41 =
  37. 37.33 + 27 =
  38. 38.78 + 21 =
  39. 39.57 + 32 =
  40. 40.26 + 14 =

Answer key

  1. 59
  2. 76
  3. 145
  4. 78
  5. 107
  6. 144
  7. 145
  8. 134
  9. 69
  10. 44
  11. 116
  12. 150
  13. 59
  14. 131
  15. 143
  16. 75
  17. 81
  18. 136
  19. 63
  20. 131
  21. 120
  22. 143
  23. 81
  24. 53
  25. 54
  26. 92
  27. 134
  28. 73
  29. 45
  30. 152
  31. 149
  32. 115
  33. 151
  34. 158
  35. 116
  36. 97
  37. 60
  38. 99
  39. 89
  40. 40

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