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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 168 · 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. 1.63 + 85 =
  2. 2.52 + 41 =
  3. 3.27 + 57 =
  4. 4.57 + 55 =
  5. 5.30 + 58 =
  6. 6.50 + 47 =
  7. 7.53 + 29 =
  8. 8.40 + 24 =
  9. 9.25 + 22 =
  10. 10.25 + 77 =
  11. 11.39 + 16 =
  12. 12.39 + 35 =
  13. 13.52 + 74 =
  14. 14.69 + 22 =
  15. 15.59 + 38 =
  16. 16.28 + 15 =
  17. 17.32 + 21 =
  18. 18.88 + 13 =
  19. 19.76 + 17 =
  20. 20.35 + 53 =
  21. 21.29 + 65 =
  22. 22.45 + 73 =
  23. 23.83 + 14 =
  24. 24.40 + 58 =
  25. 25.81 + 36 =
  26. 26.32 + 81 =
  27. 27.59 + 89 =
  28. 28.32 + 52 =
  29. 29.29 + 54 =
  30. 30.22 + 68 =
  31. 31.36 + 46 =
  32. 32.86 + 28 =
  33. 33.71 + 19 =
  34. 34.36 + 56 =
  35. 35.52 + 25 =
  36. 36.80 + 17 =
  37. 37.39 + 28 =
  38. 38.60 + 13 =
  39. 39.27 + 77 =
  40. 40.64 + 79 =

Answer key

  1. 148
  2. 93
  3. 84
  4. 112
  5. 88
  6. 97
  7. 82
  8. 64
  9. 47
  10. 102
  11. 55
  12. 74
  13. 126
  14. 91
  15. 97
  16. 43
  17. 53
  18. 101
  19. 93
  20. 88
  21. 94
  22. 118
  23. 97
  24. 98
  25. 117
  26. 113
  27. 148
  28. 84
  29. 83
  30. 90
  31. 82
  32. 114
  33. 90
  34. 92
  35. 77
  36. 97
  37. 67
  38. 73
  39. 104
  40. 143

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