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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 210 · 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. 1.48 + 16 =
  2. 2.83 + 55 =
  3. 3.45 + 31 =
  4. 4.42 + 51 =
  5. 5.30 + 35 =
  6. 6.38 + 74 =
  7. 7.39 + 26 =
  8. 8.34 + 36 =
  9. 9.28 + 29 =
  10. 10.59 + 19 =
  11. 11.84 + 16 =
  12. 12.89 + 31 =
  13. 13.48 + 41 =
  14. 14.54 + 61 =
  15. 15.62 + 25 =
  16. 16.67 + 33 =
  17. 17.28 + 52 =
  18. 18.43 + 76 =
  19. 19.23 + 73 =
  20. 20.68 + 14 =
  21. 21.77 + 14 =
  22. 22.82 + 39 =
  23. 23.23 + 53 =
  24. 24.30 + 29 =
  25. 25.33 + 54 =
  26. 26.24 + 61 =
  27. 27.30 + 27 =
  28. 28.64 + 31 =
  29. 29.83 + 85 =
  30. 30.38 + 37 =
  31. 31.61 + 46 =
  32. 32.26 + 47 =
  33. 33.47 + 44 =
  34. 34.47 + 84 =
  35. 35.49 + 34 =
  36. 36.63 + 47 =
  37. 37.27 + 19 =
  38. 38.66 + 27 =
  39. 39.69 + 31 =
  40. 40.77 + 21 =

Answer key

  1. 64
  2. 138
  3. 76
  4. 93
  5. 65
  6. 112
  7. 65
  8. 70
  9. 57
  10. 78
  11. 100
  12. 120
  13. 89
  14. 115
  15. 87
  16. 100
  17. 80
  18. 119
  19. 96
  20. 82
  21. 91
  22. 121
  23. 76
  24. 59
  25. 87
  26. 85
  27. 57
  28. 95
  29. 168
  30. 75
  31. 107
  32. 73
  33. 91
  34. 131
  35. 83
  36. 110
  37. 46
  38. 93
  39. 100
  40. 98

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