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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 626 · 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. 1.60 + 79 =
  2. 2.27 + 72 =
  3. 3.80 + 71 =
  4. 4.87 + 86 =
  5. 5.66 + 39 =
  6. 6.73 + 13 =
  7. 7.70 + 71 =
  8. 8.28 + 59 =
  9. 9.54 + 67 =
  10. 10.81 + 86 =
  11. 11.21 + 24 =
  12. 12.73 + 25 =
  13. 13.55 + 62 =
  14. 14.40 + 21 =
  15. 15.49 + 42 =
  16. 16.50 + 71 =
  17. 17.56 + 56 =
  18. 18.54 + 32 =
  19. 19.35 + 19 =
  20. 20.71 + 69 =
  21. 21.24 + 42 =
  22. 22.77 + 79 =
  23. 23.69 + 42 =
  24. 24.48 + 31 =
  25. 25.55 + 27 =
  26. 26.36 + 51 =
  27. 27.47 + 59 =
  28. 28.55 + 14 =
  29. 29.25 + 36 =
  30. 30.41 + 59 =
  31. 31.23 + 61 =
  32. 32.35 + 56 =
  33. 33.56 + 87 =
  34. 34.32 + 79 =
  35. 35.41 + 38 =
  36. 36.34 + 81 =
  37. 37.36 + 37 =
  38. 38.68 + 88 =
  39. 39.40 + 31 =
  40. 40.55 + 16 =

Answer key

  1. 139
  2. 99
  3. 151
  4. 173
  5. 105
  6. 86
  7. 141
  8. 87
  9. 121
  10. 167
  11. 45
  12. 98
  13. 117
  14. 61
  15. 91
  16. 121
  17. 112
  18. 86
  19. 54
  20. 140
  21. 66
  22. 156
  23. 111
  24. 79
  25. 82
  26. 87
  27. 106
  28. 69
  29. 61
  30. 100
  31. 84
  32. 91
  33. 143
  34. 111
  35. 79
  36. 115
  37. 73
  38. 156
  39. 71
  40. 71

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