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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 412 · 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 + 27 =
  2. 2.75 + 72 =
  3. 3.57 + 67 =
  4. 4.37 + 26 =
  5. 5.29 + 51 =
  6. 6.43 + 75 =
  7. 7.33 + 29 =
  8. 8.31 + 28 =
  9. 9.51 + 51 =
  10. 10.82 + 49 =
  11. 11.44 + 89 =
  12. 12.24 + 18 =
  13. 13.85 + 42 =
  14. 14.23 + 37 =
  15. 15.66 + 46 =
  16. 16.24 + 69 =
  17. 17.28 + 74 =
  18. 18.65 + 71 =
  19. 19.57 + 23 =
  20. 20.56 + 78 =
  21. 21.66 + 21 =
  22. 22.29 + 22 =
  23. 23.31 + 47 =
  24. 24.85 + 48 =
  25. 25.71 + 75 =
  26. 26.28 + 27 =
  27. 27.52 + 41 =
  28. 28.67 + 57 =
  29. 29.29 + 23 =
  30. 30.59 + 82 =
  31. 31.39 + 86 =
  32. 32.48 + 15 =
  33. 33.48 + 36 =
  34. 34.72 + 71 =
  35. 35.55 + 39 =
  36. 36.76 + 42 =
  37. 37.47 + 29 =
  38. 38.39 + 14 =
  39. 39.73 + 18 =
  40. 40.69 + 24 =

Answer key

  1. 102
  2. 147
  3. 124
  4. 63
  5. 80
  6. 118
  7. 62
  8. 59
  9. 102
  10. 131
  11. 133
  12. 42
  13. 127
  14. 60
  15. 112
  16. 93
  17. 102
  18. 136
  19. 80
  20. 134
  21. 87
  22. 51
  23. 78
  24. 133
  25. 146
  26. 55
  27. 93
  28. 124
  29. 52
  30. 141
  31. 125
  32. 63
  33. 84
  34. 143
  35. 94
  36. 118
  37. 76
  38. 53
  39. 91
  40. 93

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