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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 454 · 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. 1.39 + 41 =
  2. 2.22 + 16 =
  3. 3.89 + 73 =
  4. 4.36 + 87 =
  5. 5.61 + 44 =
  6. 6.47 + 39 =
  7. 7.39 + 73 =
  8. 8.25 + 69 =
  9. 9.27 + 81 =
  10. 10.80 + 75 =
  11. 11.80 + 51 =
  12. 12.72 + 37 =
  13. 13.26 + 61 =
  14. 14.25 + 73 =
  15. 15.35 + 68 =
  16. 16.85 + 39 =
  17. 17.37 + 12 =
  18. 18.68 + 57 =
  19. 19.51 + 15 =
  20. 20.66 + 89 =
  21. 21.36 + 81 =
  22. 22.48 + 81 =
  23. 23.57 + 41 =
  24. 24.52 + 14 =
  25. 25.26 + 41 =
  26. 26.22 + 23 =
  27. 27.28 + 13 =
  28. 28.21 + 22 =
  29. 29.69 + 27 =
  30. 30.31 + 17 =
  31. 31.39 + 42 =
  32. 32.68 + 82 =
  33. 33.34 + 13 =
  34. 34.21 + 24 =
  35. 35.50 + 86 =
  36. 36.74 + 51 =
  37. 37.30 + 45 =
  38. 38.36 + 67 =
  39. 39.84 + 24 =
  40. 40.86 + 64 =

Answer key

  1. 80
  2. 38
  3. 162
  4. 123
  5. 105
  6. 86
  7. 112
  8. 94
  9. 108
  10. 155
  11. 131
  12. 109
  13. 87
  14. 98
  15. 103
  16. 124
  17. 49
  18. 125
  19. 66
  20. 155
  21. 117
  22. 129
  23. 98
  24. 66
  25. 67
  26. 45
  27. 41
  28. 43
  29. 96
  30. 48
  31. 81
  32. 150
  33. 47
  34. 45
  35. 136
  36. 125
  37. 75
  38. 103
  39. 108
  40. 150

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