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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 751 · 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. 1.43 + 21 =
  2. 2.86 + 81 =
  3. 3.77 + 31 =
  4. 4.81 + 41 =
  5. 5.61 + 12 =
  6. 6.69 + 25 =
  7. 7.38 + 67 =
  8. 8.56 + 38 =
  9. 9.43 + 71 =
  10. 10.24 + 29 =
  11. 11.72 + 81 =
  12. 12.22 + 28 =
  13. 13.60 + 54 =
  14. 14.60 + 74 =
  15. 15.22 + 85 =
  16. 16.32 + 76 =
  17. 17.33 + 89 =
  18. 18.41 + 88 =
  19. 19.50 + 74 =
  20. 20.38 + 57 =
  21. 21.29 + 26 =
  22. 22.76 + 43 =
  23. 23.71 + 21 =
  24. 24.66 + 31 =
  25. 25.22 + 65 =
  26. 26.30 + 51 =
  27. 27.24 + 51 =
  28. 28.27 + 25 =
  29. 29.50 + 45 =
  30. 30.74 + 67 =
  31. 31.86 + 82 =
  32. 32.71 + 53 =
  33. 33.37 + 15 =
  34. 34.62 + 77 =
  35. 35.58 + 24 =
  36. 36.55 + 66 =
  37. 37.60 + 86 =
  38. 38.65 + 16 =
  39. 39.79 + 54 =
  40. 40.79 + 59 =

Answer key

  1. 64
  2. 167
  3. 108
  4. 122
  5. 73
  6. 94
  7. 105
  8. 94
  9. 114
  10. 53
  11. 153
  12. 50
  13. 114
  14. 134
  15. 107
  16. 108
  17. 122
  18. 129
  19. 124
  20. 95
  21. 55
  22. 119
  23. 92
  24. 97
  25. 87
  26. 81
  27. 75
  28. 52
  29. 95
  30. 141
  31. 168
  32. 124
  33. 52
  34. 139
  35. 82
  36. 121
  37. 146
  38. 81
  39. 133
  40. 138

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