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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 546 · 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. 1.65 + 83 =
  2. 2.71 + 83 =
  3. 3.62 + 48 =
  4. 4.68 + 33 =
  5. 5.39 + 46 =
  6. 6.87 + 89 =
  7. 7.43 + 72 =
  8. 8.69 + 41 =
  9. 9.31 + 44 =
  10. 10.38 + 58 =
  11. 11.54 + 22 =
  12. 12.34 + 81 =
  13. 13.39 + 54 =
  14. 14.22 + 87 =
  15. 15.34 + 78 =
  16. 16.83 + 88 =
  17. 17.26 + 51 =
  18. 18.70 + 18 =
  19. 19.60 + 52 =
  20. 20.88 + 64 =
  21. 21.31 + 73 =
  22. 22.73 + 85 =
  23. 23.73 + 89 =
  24. 24.78 + 61 =
  25. 25.57 + 14 =
  26. 26.36 + 45 =
  27. 27.60 + 87 =
  28. 28.39 + 85 =
  29. 29.33 + 21 =
  30. 30.52 + 78 =
  31. 31.22 + 75 =
  32. 32.27 + 81 =
  33. 33.30 + 76 =
  34. 34.35 + 24 =
  35. 35.22 + 15 =
  36. 36.89 + 12 =
  37. 37.38 + 31 =
  38. 38.64 + 21 =
  39. 39.70 + 48 =
  40. 40.31 + 75 =

Answer key

  1. 148
  2. 154
  3. 110
  4. 101
  5. 85
  6. 176
  7. 115
  8. 110
  9. 75
  10. 96
  11. 76
  12. 115
  13. 93
  14. 109
  15. 112
  16. 171
  17. 77
  18. 88
  19. 112
  20. 152
  21. 104
  22. 158
  23. 162
  24. 139
  25. 71
  26. 81
  27. 147
  28. 124
  29. 54
  30. 130
  31. 97
  32. 108
  33. 106
  34. 59
  35. 37
  36. 101
  37. 69
  38. 85
  39. 118
  40. 106

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