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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 81 · 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. 1.74 + 34 =
  2. 2.34 + 38 =
  3. 3.24 + 41 =
  4. 4.74 + 77 =
  5. 5.29 + 41 =
  6. 6.24 + 62 =
  7. 7.52 + 14 =
  8. 8.29 + 21 =
  9. 9.80 + 41 =
  10. 10.68 + 89 =
  11. 11.34 + 13 =
  12. 12.75 + 51 =
  13. 13.85 + 32 =
  14. 14.35 + 41 =
  15. 15.34 + 57 =
  16. 16.44 + 53 =
  17. 17.32 + 51 =
  18. 18.84 + 21 =
  19. 19.77 + 31 =
  20. 20.88 + 53 =
  21. 21.32 + 54 =
  22. 22.26 + 35 =
  23. 23.35 + 12 =
  24. 24.32 + 61 =
  25. 25.85 + 68 =
  26. 26.62 + 75 =
  27. 27.58 + 34 =
  28. 28.50 + 27 =
  29. 29.34 + 51 =
  30. 30.77 + 21 =
  31. 31.24 + 12 =
  32. 32.55 + 31 =
  33. 33.33 + 51 =
  34. 34.63 + 32 =
  35. 35.35 + 54 =
  36. 36.30 + 18 =
  37. 37.67 + 55 =
  38. 38.31 + 12 =
  39. 39.22 + 34 =
  40. 40.59 + 21 =

Answer key

  1. 108
  2. 72
  3. 65
  4. 151
  5. 70
  6. 86
  7. 66
  8. 50
  9. 121
  10. 157
  11. 47
  12. 126
  13. 117
  14. 76
  15. 91
  16. 97
  17. 83
  18. 105
  19. 108
  20. 141
  21. 86
  22. 61
  23. 47
  24. 93
  25. 153
  26. 137
  27. 92
  28. 77
  29. 85
  30. 98
  31. 36
  32. 86
  33. 84
  34. 95
  35. 89
  36. 48
  37. 122
  38. 43
  39. 56
  40. 80

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