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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 61 · 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. 1.36 + 61 =
  2. 2.47 + 24 =
  3. 3.64 + 75 =
  4. 4.60 + 58 =
  5. 5.56 + 42 =
  6. 6.61 + 32 =
  7. 7.71 + 13 =
  8. 8.76 + 69 =
  9. 9.36 + 41 =
  10. 10.51 + 18 =
  11. 11.36 + 86 =
  12. 12.52 + 32 =
  13. 13.27 + 25 =
  14. 14.55 + 78 =
  15. 15.33 + 42 =
  16. 16.89 + 37 =
  17. 17.23 + 69 =
  18. 18.70 + 47 =
  19. 19.59 + 22 =
  20. 20.46 + 31 =
  21. 21.42 + 46 =
  22. 22.72 + 53 =
  23. 23.79 + 33 =
  24. 24.86 + 31 =
  25. 25.85 + 82 =
  26. 26.55 + 25 =
  27. 27.76 + 16 =
  28. 28.33 + 25 =
  29. 29.77 + 63 =
  30. 30.57 + 87 =
  31. 31.47 + 55 =
  32. 32.80 + 32 =
  33. 33.46 + 71 =
  34. 34.30 + 17 =
  35. 35.21 + 45 =
  36. 36.55 + 15 =
  37. 37.62 + 58 =
  38. 38.61 + 52 =
  39. 39.30 + 74 =
  40. 40.44 + 38 =

Answer key

  1. 97
  2. 71
  3. 139
  4. 118
  5. 98
  6. 93
  7. 84
  8. 145
  9. 77
  10. 69
  11. 122
  12. 84
  13. 52
  14. 133
  15. 75
  16. 126
  17. 92
  18. 117
  19. 81
  20. 77
  21. 88
  22. 125
  23. 112
  24. 117
  25. 167
  26. 80
  27. 92
  28. 58
  29. 140
  30. 144
  31. 102
  32. 112
  33. 117
  34. 47
  35. 66
  36. 70
  37. 120
  38. 113
  39. 104
  40. 82

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