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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 38 · 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 + 84 =
  2. 2.85 + 18 =
  3. 3.73 + 41 =
  4. 4.46 + 45 =
  5. 5.76 + 88 =
  6. 6.77 + 87 =
  7. 7.36 + 44 =
  8. 8.88 + 41 =
  9. 9.74 + 61 =
  10. 10.77 + 32 =
  11. 11.41 + 31 =
  12. 12.81 + 51 =
  13. 13.53 + 51 =
  14. 14.54 + 42 =
  15. 15.80 + 51 =
  16. 16.32 + 76 =
  17. 17.45 + 76 =
  18. 18.27 + 16 =
  19. 19.49 + 15 =
  20. 20.41 + 26 =
  21. 21.25 + 21 =
  22. 22.65 + 64 =
  23. 23.84 + 45 =
  24. 24.34 + 14 =
  25. 25.88 + 57 =
  26. 26.27 + 23 =
  27. 27.21 + 84 =
  28. 28.32 + 12 =
  29. 29.22 + 31 =
  30. 30.40 + 86 =
  31. 31.31 + 17 =
  32. 32.89 + 66 =
  33. 33.67 + 21 =
  34. 34.59 + 29 =
  35. 35.83 + 56 =
  36. 36.36 + 64 =
  37. 37.76 + 47 =
  38. 38.54 + 39 =
  39. 39.65 + 14 =
  40. 40.36 + 35 =

Answer key

  1. 113
  2. 103
  3. 114
  4. 91
  5. 164
  6. 164
  7. 80
  8. 129
  9. 135
  10. 109
  11. 72
  12. 132
  13. 104
  14. 96
  15. 131
  16. 108
  17. 121
  18. 43
  19. 64
  20. 67
  21. 46
  22. 129
  23. 129
  24. 48
  25. 145
  26. 50
  27. 105
  28. 44
  29. 53
  30. 126
  31. 48
  32. 155
  33. 88
  34. 88
  35. 139
  36. 100
  37. 123
  38. 93
  39. 79
  40. 71

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