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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 382 · 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. 1.29 + 43 =
  2. 2.51 + 83 =
  3. 3.49 + 12 =
  4. 4.55 + 71 =
  5. 5.59 + 41 =
  6. 6.28 + 34 =
  7. 7.65 + 74 =
  8. 8.23 + 43 =
  9. 9.68 + 75 =
  10. 10.70 + 76 =
  11. 11.51 + 84 =
  12. 12.49 + 59 =
  13. 13.58 + 31 =
  14. 14.25 + 15 =
  15. 15.56 + 87 =
  16. 16.33 + 79 =
  17. 17.46 + 59 =
  18. 18.33 + 17 =
  19. 19.26 + 86 =
  20. 20.28 + 71 =
  21. 21.79 + 14 =
  22. 22.49 + 61 =
  23. 23.64 + 26 =
  24. 24.59 + 33 =
  25. 25.83 + 87 =
  26. 26.37 + 51 =
  27. 27.70 + 25 =
  28. 28.21 + 59 =
  29. 29.28 + 64 =
  30. 30.21 + 77 =
  31. 31.43 + 51 =
  32. 32.46 + 37 =
  33. 33.56 + 71 =
  34. 34.46 + 51 =
  35. 35.62 + 84 =
  36. 36.87 + 51 =
  37. 37.62 + 14 =
  38. 38.41 + 21 =
  39. 39.69 + 56 =
  40. 40.82 + 15 =

Answer key

  1. 72
  2. 134
  3. 61
  4. 126
  5. 100
  6. 62
  7. 139
  8. 66
  9. 143
  10. 146
  11. 135
  12. 108
  13. 89
  14. 40
  15. 143
  16. 112
  17. 105
  18. 50
  19. 112
  20. 99
  21. 93
  22. 110
  23. 90
  24. 92
  25. 170
  26. 88
  27. 95
  28. 80
  29. 92
  30. 98
  31. 94
  32. 83
  33. 127
  34. 97
  35. 146
  36. 138
  37. 76
  38. 62
  39. 125
  40. 97

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