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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 456 · 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. 1.35 + 55 =
  2. 2.80 + 28 =
  3. 3.24 + 55 =
  4. 4.80 + 51 =
  5. 5.87 + 34 =
  6. 6.62 + 31 =
  7. 7.41 + 79 =
  8. 8.34 + 64 =
  9. 9.29 + 23 =
  10. 10.64 + 55 =
  11. 11.66 + 72 =
  12. 12.35 + 84 =
  13. 13.76 + 32 =
  14. 14.72 + 48 =
  15. 15.30 + 56 =
  16. 16.57 + 31 =
  17. 17.29 + 38 =
  18. 18.52 + 34 =
  19. 19.22 + 56 =
  20. 20.59 + 26 =
  21. 21.87 + 82 =
  22. 22.42 + 13 =
  23. 23.28 + 69 =
  24. 24.45 + 14 =
  25. 25.70 + 27 =
  26. 26.75 + 15 =
  27. 27.46 + 65 =
  28. 28.82 + 32 =
  29. 29.57 + 56 =
  30. 30.35 + 87 =
  31. 31.57 + 41 =
  32. 32.87 + 31 =
  33. 33.31 + 35 =
  34. 34.81 + 83 =
  35. 35.63 + 59 =
  36. 36.50 + 87 =
  37. 37.66 + 16 =
  38. 38.32 + 12 =
  39. 39.33 + 77 =
  40. 40.73 + 74 =

Answer key

  1. 90
  2. 108
  3. 79
  4. 131
  5. 121
  6. 93
  7. 120
  8. 98
  9. 52
  10. 119
  11. 138
  12. 119
  13. 108
  14. 120
  15. 86
  16. 88
  17. 67
  18. 86
  19. 78
  20. 85
  21. 169
  22. 55
  23. 97
  24. 59
  25. 97
  26. 90
  27. 111
  28. 114
  29. 113
  30. 122
  31. 98
  32. 118
  33. 66
  34. 164
  35. 122
  36. 137
  37. 82
  38. 44
  39. 110
  40. 147

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