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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 453 · 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. 1.57 + 63 =
  2. 2.64 + 73 =
  3. 3.69 + 27 =
  4. 4.66 + 19 =
  5. 5.30 + 71 =
  6. 6.87 + 79 =
  7. 7.56 + 46 =
  8. 8.85 + 83 =
  9. 9.78 + 19 =
  10. 10.59 + 61 =
  11. 11.35 + 83 =
  12. 12.88 + 63 =
  13. 13.57 + 14 =
  14. 14.21 + 61 =
  15. 15.37 + 37 =
  16. 16.33 + 15 =
  17. 17.67 + 18 =
  18. 18.85 + 36 =
  19. 19.82 + 14 =
  20. 20.65 + 17 =
  21. 21.28 + 64 =
  22. 22.37 + 25 =
  23. 23.49 + 78 =
  24. 24.66 + 54 =
  25. 25.23 + 27 =
  26. 26.70 + 76 =
  27. 27.44 + 45 =
  28. 28.66 + 21 =
  29. 29.38 + 73 =
  30. 30.71 + 75 =
  31. 31.39 + 84 =
  32. 32.35 + 74 =
  33. 33.22 + 39 =
  34. 34.67 + 63 =
  35. 35.39 + 15 =
  36. 36.64 + 33 =
  37. 37.55 + 42 =
  38. 38.23 + 88 =
  39. 39.41 + 63 =
  40. 40.31 + 55 =

Answer key

  1. 120
  2. 137
  3. 96
  4. 85
  5. 101
  6. 166
  7. 102
  8. 168
  9. 97
  10. 120
  11. 118
  12. 151
  13. 71
  14. 82
  15. 74
  16. 48
  17. 85
  18. 121
  19. 96
  20. 82
  21. 92
  22. 62
  23. 127
  24. 120
  25. 50
  26. 146
  27. 89
  28. 87
  29. 111
  30. 146
  31. 123
  32. 109
  33. 61
  34. 130
  35. 54
  36. 97
  37. 97
  38. 111
  39. 104
  40. 86

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