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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 561 · 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. 1.67 + 86 =
  2. 2.34 + 39 =
  3. 3.23 + 31 =
  4. 4.34 + 77 =
  5. 5.32 + 26 =
  6. 6.57 + 31 =
  7. 7.49 + 41 =
  8. 8.87 + 81 =
  9. 9.53 + 18 =
  10. 10.64 + 74 =
  11. 11.66 + 25 =
  12. 12.29 + 21 =
  13. 13.36 + 71 =
  14. 14.79 + 87 =
  15. 15.30 + 56 =
  16. 16.80 + 19 =
  17. 17.51 + 28 =
  18. 18.34 + 82 =
  19. 19.30 + 86 =
  20. 20.40 + 82 =
  21. 21.73 + 41 =
  22. 22.65 + 25 =
  23. 23.24 + 52 =
  24. 24.51 + 25 =
  25. 25.65 + 14 =
  26. 26.60 + 24 =
  27. 27.66 + 72 =
  28. 28.38 + 54 =
  29. 29.45 + 81 =
  30. 30.64 + 81 =
  31. 31.32 + 14 =
  32. 32.62 + 43 =
  33. 33.21 + 76 =
  34. 34.50 + 74 =
  35. 35.44 + 78 =
  36. 36.86 + 44 =
  37. 37.62 + 71 =
  38. 38.53 + 13 =
  39. 39.41 + 18 =
  40. 40.86 + 21 =

Answer key

  1. 153
  2. 73
  3. 54
  4. 111
  5. 58
  6. 88
  7. 90
  8. 168
  9. 71
  10. 138
  11. 91
  12. 50
  13. 107
  14. 166
  15. 86
  16. 99
  17. 79
  18. 116
  19. 116
  20. 122
  21. 114
  22. 90
  23. 76
  24. 76
  25. 79
  26. 84
  27. 138
  28. 92
  29. 126
  30. 145
  31. 46
  32. 105
  33. 97
  34. 124
  35. 122
  36. 130
  37. 133
  38. 66
  39. 59
  40. 107

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