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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 741 · 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. 1.53 + 73 =
  2. 2.37 + 79 =
  3. 3.49 + 13 =
  4. 4.59 + 69 =
  5. 5.40 + 65 =
  6. 6.88 + 59 =
  7. 7.35 + 49 =
  8. 8.39 + 68 =
  9. 9.69 + 81 =
  10. 10.84 + 38 =
  11. 11.24 + 89 =
  12. 12.46 + 31 =
  13. 13.49 + 31 =
  14. 14.38 + 38 =
  15. 15.70 + 75 =
  16. 16.43 + 81 =
  17. 17.51 + 26 =
  18. 18.49 + 25 =
  19. 19.71 + 65 =
  20. 20.23 + 71 =
  21. 21.83 + 34 =
  22. 22.77 + 29 =
  23. 23.36 + 53 =
  24. 24.53 + 52 =
  25. 25.22 + 58 =
  26. 26.40 + 32 =
  27. 27.21 + 34 =
  28. 28.22 + 84 =
  29. 29.75 + 29 =
  30. 30.40 + 13 =
  31. 31.83 + 41 =
  32. 32.56 + 32 =
  33. 33.50 + 83 =
  34. 34.24 + 71 =
  35. 35.43 + 86 =
  36. 36.30 + 34 =
  37. 37.25 + 51 =
  38. 38.50 + 81 =
  39. 39.52 + 42 =
  40. 40.28 + 52 =

Answer key

  1. 126
  2. 116
  3. 62
  4. 128
  5. 105
  6. 147
  7. 84
  8. 107
  9. 150
  10. 122
  11. 113
  12. 77
  13. 80
  14. 76
  15. 145
  16. 124
  17. 77
  18. 74
  19. 136
  20. 94
  21. 117
  22. 106
  23. 89
  24. 105
  25. 80
  26. 72
  27. 55
  28. 106
  29. 104
  30. 53
  31. 124
  32. 88
  33. 133
  34. 95
  35. 129
  36. 64
  37. 76
  38. 131
  39. 94
  40. 80

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