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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 709 · 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. 1.79 + 24 =
  2. 2.38 + 26 =
  3. 3.32 + 55 =
  4. 4.40 + 87 =
  5. 5.21 + 79 =
  6. 6.51 + 31 =
  7. 7.36 + 55 =
  8. 8.27 + 84 =
  9. 9.31 + 51 =
  10. 10.35 + 71 =
  11. 11.57 + 23 =
  12. 12.53 + 21 =
  13. 13.24 + 62 =
  14. 14.87 + 29 =
  15. 15.48 + 24 =
  16. 16.25 + 37 =
  17. 17.83 + 52 =
  18. 18.25 + 28 =
  19. 19.77 + 51 =
  20. 20.56 + 83 =
  21. 21.59 + 28 =
  22. 22.39 + 83 =
  23. 23.86 + 63 =
  24. 24.64 + 43 =
  25. 25.22 + 73 =
  26. 26.57 + 19 =
  27. 27.42 + 87 =
  28. 28.26 + 69 =
  29. 29.22 + 15 =
  30. 30.28 + 77 =
  31. 31.51 + 57 =
  32. 32.34 + 26 =
  33. 33.26 + 45 =
  34. 34.23 + 21 =
  35. 35.29 + 31 =
  36. 36.56 + 17 =
  37. 37.52 + 87 =
  38. 38.72 + 21 =
  39. 39.25 + 24 =
  40. 40.89 + 71 =

Answer key

  1. 103
  2. 64
  3. 87
  4. 127
  5. 100
  6. 82
  7. 91
  8. 111
  9. 82
  10. 106
  11. 80
  12. 74
  13. 86
  14. 116
  15. 72
  16. 62
  17. 135
  18. 53
  19. 128
  20. 139
  21. 87
  22. 122
  23. 149
  24. 107
  25. 95
  26. 76
  27. 129
  28. 95
  29. 37
  30. 105
  31. 108
  32. 60
  33. 71
  34. 44
  35. 60
  36. 73
  37. 139
  38. 93
  39. 49
  40. 160

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