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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 200 · 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. 1.21 + 21 =
  2. 2.52 + 22 =
  3. 3.48 + 68 =
  4. 4.29 + 61 =
  5. 5.21 + 48 =
  6. 6.83 + 79 =
  7. 7.33 + 23 =
  8. 8.45 + 36 =
  9. 9.80 + 39 =
  10. 10.48 + 72 =
  11. 11.61 + 54 =
  12. 12.23 + 82 =
  13. 13.28 + 19 =
  14. 14.85 + 56 =
  15. 15.30 + 47 =
  16. 16.68 + 51 =
  17. 17.39 + 58 =
  18. 18.42 + 14 =
  19. 19.54 + 31 =
  20. 20.66 + 21 =
  21. 21.61 + 41 =
  22. 22.84 + 28 =
  23. 23.69 + 65 =
  24. 24.34 + 12 =
  25. 25.52 + 39 =
  26. 26.54 + 54 =
  27. 27.81 + 87 =
  28. 28.31 + 13 =
  29. 29.44 + 18 =
  30. 30.30 + 57 =
  31. 31.73 + 26 =
  32. 32.44 + 33 =
  33. 33.63 + 21 =
  34. 34.82 + 18 =
  35. 35.60 + 86 =
  36. 36.88 + 54 =
  37. 37.41 + 35 =
  38. 38.38 + 13 =
  39. 39.66 + 77 =
  40. 40.58 + 83 =

Answer key

  1. 42
  2. 74
  3. 116
  4. 90
  5. 69
  6. 162
  7. 56
  8. 81
  9. 119
  10. 120
  11. 115
  12. 105
  13. 47
  14. 141
  15. 77
  16. 119
  17. 97
  18. 56
  19. 85
  20. 87
  21. 102
  22. 112
  23. 134
  24. 46
  25. 91
  26. 108
  27. 168
  28. 44
  29. 62
  30. 87
  31. 99
  32. 77
  33. 84
  34. 100
  35. 146
  36. 142
  37. 76
  38. 51
  39. 143
  40. 141

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