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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 22 · 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. 1.28 + 65 =
  2. 2.55 + 21 =
  3. 3.72 + 35 =
  4. 4.66 + 36 =
  5. 5.63 + 65 =
  6. 6.66 + 71 =
  7. 7.48 + 21 =
  8. 8.31 + 82 =
  9. 9.46 + 21 =
  10. 10.83 + 16 =
  11. 11.27 + 19 =
  12. 12.25 + 18 =
  13. 13.23 + 72 =
  14. 14.84 + 24 =
  15. 15.65 + 38 =
  16. 16.86 + 59 =
  17. 17.41 + 81 =
  18. 18.43 + 19 =
  19. 19.51 + 35 =
  20. 20.27 + 63 =
  21. 21.84 + 17 =
  22. 22.38 + 33 =
  23. 23.32 + 12 =
  24. 24.65 + 34 =
  25. 25.36 + 34 =
  26. 26.21 + 24 =
  27. 27.63 + 21 =
  28. 28.26 + 81 =
  29. 29.34 + 59 =
  30. 30.66 + 31 =
  31. 31.69 + 61 =
  32. 32.56 + 42 =
  33. 33.74 + 36 =
  34. 34.52 + 13 =
  35. 35.57 + 19 =
  36. 36.77 + 38 =
  37. 37.22 + 45 =
  38. 38.56 + 12 =
  39. 39.53 + 38 =
  40. 40.41 + 79 =

Answer key

  1. 93
  2. 76
  3. 107
  4. 102
  5. 128
  6. 137
  7. 69
  8. 113
  9. 67
  10. 99
  11. 46
  12. 43
  13. 95
  14. 108
  15. 103
  16. 145
  17. 122
  18. 62
  19. 86
  20. 90
  21. 101
  22. 71
  23. 44
  24. 99
  25. 70
  26. 45
  27. 84
  28. 107
  29. 93
  30. 97
  31. 130
  32. 98
  33. 110
  34. 65
  35. 76
  36. 115
  37. 67
  38. 68
  39. 91
  40. 120

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