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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 13 · 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. 1.33 + 89 =
  2. 2.79 + 88 =
  3. 3.31 + 49 =
  4. 4.69 + 81 =
  5. 5.68 + 18 =
  6. 6.49 + 28 =
  7. 7.57 + 33 =
  8. 8.38 + 52 =
  9. 9.72 + 52 =
  10. 10.80 + 19 =
  11. 11.29 + 19 =
  12. 12.59 + 45 =
  13. 13.27 + 56 =
  14. 14.81 + 41 =
  15. 15.74 + 63 =
  16. 16.52 + 13 =
  17. 17.39 + 23 =
  18. 18.44 + 49 =
  19. 19.39 + 75 =
  20. 20.36 + 56 =
  21. 21.25 + 64 =
  22. 22.37 + 25 =
  23. 23.68 + 37 =
  24. 24.28 + 41 =
  25. 25.38 + 74 =
  26. 26.87 + 83 =
  27. 27.41 + 29 =
  28. 28.73 + 38 =
  29. 29.78 + 36 =
  30. 30.76 + 35 =
  31. 31.63 + 24 =
  32. 32.35 + 31 =
  33. 33.35 + 33 =
  34. 34.67 + 34 =
  35. 35.56 + 18 =
  36. 36.52 + 15 =
  37. 37.60 + 43 =
  38. 38.47 + 62 =
  39. 39.62 + 47 =
  40. 40.83 + 22 =

Answer key

  1. 122
  2. 167
  3. 80
  4. 150
  5. 86
  6. 77
  7. 90
  8. 90
  9. 124
  10. 99
  11. 48
  12. 104
  13. 83
  14. 122
  15. 137
  16. 65
  17. 62
  18. 93
  19. 114
  20. 92
  21. 89
  22. 62
  23. 105
  24. 69
  25. 112
  26. 170
  27. 70
  28. 111
  29. 114
  30. 111
  31. 87
  32. 66
  33. 68
  34. 101
  35. 74
  36. 67
  37. 103
  38. 109
  39. 109
  40. 105

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