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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 643 · 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. 1.45 + 31 =
  2. 2.75 + 77 =
  3. 3.29 + 23 =
  4. 4.54 + 75 =
  5. 5.49 + 71 =
  6. 6.28 + 31 =
  7. 7.84 + 85 =
  8. 8.52 + 31 =
  9. 9.47 + 18 =
  10. 10.67 + 54 =
  11. 11.26 + 58 =
  12. 12.36 + 12 =
  13. 13.38 + 18 =
  14. 14.21 + 55 =
  15. 15.58 + 78 =
  16. 16.23 + 46 =
  17. 17.36 + 31 =
  18. 18.43 + 64 =
  19. 19.72 + 38 =
  20. 20.44 + 31 =
  21. 21.68 + 61 =
  22. 22.87 + 39 =
  23. 23.28 + 71 =
  24. 24.34 + 42 =
  25. 25.33 + 53 =
  26. 26.40 + 67 =
  27. 27.57 + 44 =
  28. 28.26 + 25 =
  29. 29.85 + 39 =
  30. 30.28 + 17 =
  31. 31.84 + 69 =
  32. 32.56 + 81 =
  33. 33.49 + 41 =
  34. 34.79 + 44 =
  35. 35.25 + 65 =
  36. 36.35 + 14 =
  37. 37.26 + 29 =
  38. 38.56 + 83 =
  39. 39.57 + 12 =
  40. 40.23 + 51 =

Answer key

  1. 76
  2. 152
  3. 52
  4. 129
  5. 120
  6. 59
  7. 169
  8. 83
  9. 65
  10. 121
  11. 84
  12. 48
  13. 56
  14. 76
  15. 136
  16. 69
  17. 67
  18. 107
  19. 110
  20. 75
  21. 129
  22. 126
  23. 99
  24. 76
  25. 86
  26. 107
  27. 101
  28. 51
  29. 124
  30. 45
  31. 153
  32. 137
  33. 90
  34. 123
  35. 90
  36. 49
  37. 55
  38. 139
  39. 69
  40. 74

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