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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 569 · 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. 1.75 + 25 =
  2. 2.64 + 13 =
  3. 3.88 + 44 =
  4. 4.36 + 61 =
  5. 5.72 + 81 =
  6. 6.67 + 16 =
  7. 7.65 + 28 =
  8. 8.39 + 22 =
  9. 9.72 + 21 =
  10. 10.85 + 57 =
  11. 11.68 + 46 =
  12. 12.57 + 84 =
  13. 13.40 + 24 =
  14. 14.54 + 79 =
  15. 15.32 + 29 =
  16. 16.34 + 22 =
  17. 17.87 + 68 =
  18. 18.60 + 43 =
  19. 19.58 + 44 =
  20. 20.59 + 81 =
  21. 21.31 + 18 =
  22. 22.24 + 14 =
  23. 23.45 + 58 =
  24. 24.57 + 17 =
  25. 25.54 + 78 =
  26. 26.21 + 72 =
  27. 27.22 + 25 =
  28. 28.38 + 78 =
  29. 29.26 + 39 =
  30. 30.87 + 67 =
  31. 31.30 + 41 =
  32. 32.56 + 78 =
  33. 33.65 + 56 =
  34. 34.58 + 77 =
  35. 35.55 + 25 =
  36. 36.72 + 61 =
  37. 37.31 + 16 =
  38. 38.21 + 12 =
  39. 39.58 + 53 =
  40. 40.62 + 16 =

Answer key

  1. 100
  2. 77
  3. 132
  4. 97
  5. 153
  6. 83
  7. 93
  8. 61
  9. 93
  10. 142
  11. 114
  12. 141
  13. 64
  14. 133
  15. 61
  16. 56
  17. 155
  18. 103
  19. 102
  20. 140
  21. 49
  22. 38
  23. 103
  24. 74
  25. 132
  26. 93
  27. 47
  28. 116
  29. 65
  30. 154
  31. 71
  32. 134
  33. 121
  34. 135
  35. 80
  36. 133
  37. 47
  38. 33
  39. 111
  40. 78

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