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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 84 · 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. 1.37 + 21 =
  2. 2.86 + 42 =
  3. 3.82 + 45 =
  4. 4.65 + 65 =
  5. 5.59 + 77 =
  6. 6.52 + 41 =
  7. 7.62 + 12 =
  8. 8.29 + 85 =
  9. 9.49 + 19 =
  10. 10.66 + 31 =
  11. 11.21 + 53 =
  12. 12.40 + 18 =
  13. 13.31 + 13 =
  14. 14.60 + 14 =
  15. 15.59 + 51 =
  16. 16.70 + 15 =
  17. 17.47 + 34 =
  18. 18.28 + 52 =
  19. 19.22 + 15 =
  20. 20.31 + 21 =
  21. 21.73 + 61 =
  22. 22.21 + 84 =
  23. 23.50 + 51 =
  24. 24.84 + 44 =
  25. 25.88 + 47 =
  26. 26.48 + 79 =
  27. 27.53 + 35 =
  28. 28.37 + 25 =
  29. 29.83 + 48 =
  30. 30.30 + 44 =
  31. 31.25 + 31 =
  32. 32.37 + 15 =
  33. 33.83 + 29 =
  34. 34.36 + 46 =
  35. 35.87 + 46 =
  36. 36.42 + 27 =
  37. 37.32 + 66 =
  38. 38.51 + 31 =
  39. 39.89 + 88 =
  40. 40.45 + 66 =

Answer key

  1. 58
  2. 128
  3. 127
  4. 130
  5. 136
  6. 93
  7. 74
  8. 114
  9. 68
  10. 97
  11. 74
  12. 58
  13. 44
  14. 74
  15. 110
  16. 85
  17. 81
  18. 80
  19. 37
  20. 52
  21. 134
  22. 105
  23. 101
  24. 128
  25. 135
  26. 127
  27. 88
  28. 62
  29. 131
  30. 74
  31. 56
  32. 52
  33. 112
  34. 82
  35. 133
  36. 69
  37. 98
  38. 82
  39. 177
  40. 111

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