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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 386 · 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 + 24 =
  2. 2.33 + 56 =
  3. 3.69 + 83 =
  4. 4.37 + 42 =
  5. 5.43 + 38 =
  6. 6.89 + 34 =
  7. 7.24 + 48 =
  8. 8.45 + 33 =
  9. 9.29 + 32 =
  10. 10.79 + 58 =
  11. 11.80 + 36 =
  12. 12.62 + 32 =
  13. 13.40 + 13 =
  14. 14.71 + 55 =
  15. 15.56 + 81 =
  16. 16.34 + 54 =
  17. 17.69 + 33 =
  18. 18.72 + 42 =
  19. 19.21 + 59 =
  20. 20.39 + 57 =
  21. 21.29 + 45 =
  22. 22.51 + 37 =
  23. 23.40 + 36 =
  24. 24.49 + 59 =
  25. 25.47 + 26 =
  26. 26.84 + 55 =
  27. 27.23 + 22 =
  28. 28.76 + 76 =
  29. 29.58 + 46 =
  30. 30.27 + 19 =
  31. 31.89 + 19 =
  32. 32.30 + 59 =
  33. 33.47 + 43 =
  34. 34.24 + 31 =
  35. 35.45 + 44 =
  36. 36.24 + 45 =
  37. 37.48 + 19 =
  38. 38.52 + 41 =
  39. 39.34 + 49 =
  40. 40.26 + 52 =

Answer key

  1. 53
  2. 89
  3. 152
  4. 79
  5. 81
  6. 123
  7. 72
  8. 78
  9. 61
  10. 137
  11. 116
  12. 94
  13. 53
  14. 126
  15. 137
  16. 88
  17. 102
  18. 114
  19. 80
  20. 96
  21. 74
  22. 88
  23. 76
  24. 108
  25. 73
  26. 139
  27. 45
  28. 152
  29. 104
  30. 46
  31. 108
  32. 89
  33. 90
  34. 55
  35. 89
  36. 69
  37. 67
  38. 93
  39. 83
  40. 78

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