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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 667 · 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. 1.28 + 41 =
  2. 2.47 + 45 =
  3. 3.78 + 68 =
  4. 4.50 + 28 =
  5. 5.30 + 16 =
  6. 6.77 + 31 =
  7. 7.81 + 81 =
  8. 8.60 + 76 =
  9. 9.85 + 46 =
  10. 10.85 + 44 =
  11. 11.57 + 89 =
  12. 12.40 + 71 =
  13. 13.85 + 33 =
  14. 14.51 + 65 =
  15. 15.89 + 33 =
  16. 16.76 + 81 =
  17. 17.33 + 35 =
  18. 18.48 + 41 =
  19. 19.66 + 57 =
  20. 20.83 + 36 =
  21. 21.54 + 16 =
  22. 22.40 + 14 =
  23. 23.67 + 48 =
  24. 24.34 + 47 =
  25. 25.47 + 28 =
  26. 26.87 + 76 =
  27. 27.31 + 44 =
  28. 28.26 + 56 =
  29. 29.34 + 66 =
  30. 30.31 + 21 =
  31. 31.21 + 29 =
  32. 32.69 + 84 =
  33. 33.78 + 49 =
  34. 34.50 + 39 =
  35. 35.45 + 13 =
  36. 36.73 + 74 =
  37. 37.22 + 21 =
  38. 38.22 + 22 =
  39. 39.69 + 12 =
  40. 40.84 + 87 =

Answer key

  1. 69
  2. 92
  3. 146
  4. 78
  5. 46
  6. 108
  7. 162
  8. 136
  9. 131
  10. 129
  11. 146
  12. 111
  13. 118
  14. 116
  15. 122
  16. 157
  17. 68
  18. 89
  19. 123
  20. 119
  21. 70
  22. 54
  23. 115
  24. 81
  25. 75
  26. 163
  27. 75
  28. 82
  29. 100
  30. 52
  31. 50
  32. 153
  33. 127
  34. 89
  35. 58
  36. 147
  37. 43
  38. 44
  39. 81
  40. 171

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