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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 647 · 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. 1.21 + 55 =
  2. 2.42 + 89 =
  3. 3.83 + 18 =
  4. 4.54 + 63 =
  5. 5.68 + 64 =
  6. 6.42 + 34 =
  7. 7.89 + 27 =
  8. 8.78 + 54 =
  9. 9.81 + 71 =
  10. 10.59 + 59 =
  11. 11.44 + 81 =
  12. 12.68 + 24 =
  13. 13.37 + 53 =
  14. 14.75 + 36 =
  15. 15.26 + 19 =
  16. 16.68 + 85 =
  17. 17.28 + 66 =
  18. 18.88 + 88 =
  19. 19.79 + 21 =
  20. 20.38 + 45 =
  21. 21.44 + 46 =
  22. 22.77 + 21 =
  23. 23.49 + 19 =
  24. 24.85 + 55 =
  25. 25.75 + 83 =
  26. 26.44 + 19 =
  27. 27.24 + 29 =
  28. 28.37 + 31 =
  29. 29.33 + 54 =
  30. 30.48 + 33 =
  31. 31.55 + 52 =
  32. 32.84 + 47 =
  33. 33.71 + 25 =
  34. 34.46 + 42 =
  35. 35.22 + 48 =
  36. 36.40 + 42 =
  37. 37.27 + 76 =
  38. 38.49 + 15 =
  39. 39.26 + 14 =
  40. 40.26 + 64 =

Answer key

  1. 76
  2. 131
  3. 101
  4. 117
  5. 132
  6. 76
  7. 116
  8. 132
  9. 152
  10. 118
  11. 125
  12. 92
  13. 90
  14. 111
  15. 45
  16. 153
  17. 94
  18. 176
  19. 100
  20. 83
  21. 90
  22. 98
  23. 68
  24. 140
  25. 158
  26. 63
  27. 53
  28. 68
  29. 87
  30. 81
  31. 107
  32. 131
  33. 96
  34. 88
  35. 70
  36. 82
  37. 103
  38. 64
  39. 40
  40. 90

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