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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 282 · 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. 1.33 + 58 =
  2. 2.81 + 32 =
  3. 3.81 + 53 =
  4. 4.62 + 36 =
  5. 5.75 + 76 =
  6. 6.48 + 66 =
  7. 7.33 + 28 =
  8. 8.34 + 49 =
  9. 9.21 + 21 =
  10. 10.49 + 51 =
  11. 11.22 + 57 =
  12. 12.27 + 31 =
  13. 13.66 + 12 =
  14. 14.50 + 21 =
  15. 15.54 + 77 =
  16. 16.29 + 84 =
  17. 17.27 + 35 =
  18. 18.23 + 21 =
  19. 19.83 + 32 =
  20. 20.37 + 58 =
  21. 21.65 + 66 =
  22. 22.72 + 18 =
  23. 23.33 + 25 =
  24. 24.37 + 76 =
  25. 25.42 + 43 =
  26. 26.83 + 16 =
  27. 27.69 + 56 =
  28. 28.80 + 21 =
  29. 29.34 + 32 =
  30. 30.43 + 15 =
  31. 31.25 + 55 =
  32. 32.78 + 85 =
  33. 33.39 + 15 =
  34. 34.34 + 18 =
  35. 35.28 + 41 =
  36. 36.34 + 85 =
  37. 37.32 + 46 =
  38. 38.22 + 59 =
  39. 39.78 + 14 =
  40. 40.24 + 39 =

Answer key

  1. 91
  2. 113
  3. 134
  4. 98
  5. 151
  6. 114
  7. 61
  8. 83
  9. 42
  10. 100
  11. 79
  12. 58
  13. 78
  14. 71
  15. 131
  16. 113
  17. 62
  18. 44
  19. 115
  20. 95
  21. 131
  22. 90
  23. 58
  24. 113
  25. 85
  26. 99
  27. 125
  28. 101
  29. 66
  30. 58
  31. 80
  32. 163
  33. 54
  34. 52
  35. 69
  36. 119
  37. 78
  38. 81
  39. 92
  40. 63

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