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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 324 · 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. 1.87 + 81 =
  2. 2.23 + 38 =
  3. 3.24 + 51 =
  4. 4.40 + 29 =
  5. 5.85 + 74 =
  6. 6.86 + 17 =
  7. 7.38 + 49 =
  8. 8.62 + 32 =
  9. 9.88 + 89 =
  10. 10.58 + 21 =
  11. 11.25 + 76 =
  12. 12.22 + 69 =
  13. 13.62 + 63 =
  14. 14.23 + 31 =
  15. 15.75 + 12 =
  16. 16.51 + 65 =
  17. 17.38 + 31 =
  18. 18.84 + 48 =
  19. 19.38 + 36 =
  20. 20.34 + 75 =
  21. 21.38 + 85 =
  22. 22.43 + 64 =
  23. 23.84 + 65 =
  24. 24.71 + 13 =
  25. 25.62 + 77 =
  26. 26.73 + 13 =
  27. 27.82 + 59 =
  28. 28.28 + 35 =
  29. 29.47 + 61 =
  30. 30.87 + 64 =
  31. 31.68 + 81 =
  32. 32.33 + 17 =
  33. 33.49 + 34 =
  34. 34.33 + 81 =
  35. 35.82 + 35 =
  36. 36.39 + 21 =
  37. 37.54 + 26 =
  38. 38.60 + 64 =
  39. 39.38 + 62 =
  40. 40.35 + 24 =

Answer key

  1. 168
  2. 61
  3. 75
  4. 69
  5. 159
  6. 103
  7. 87
  8. 94
  9. 177
  10. 79
  11. 101
  12. 91
  13. 125
  14. 54
  15. 87
  16. 116
  17. 69
  18. 132
  19. 74
  20. 109
  21. 123
  22. 107
  23. 149
  24. 84
  25. 139
  26. 86
  27. 141
  28. 63
  29. 108
  30. 151
  31. 149
  32. 50
  33. 83
  34. 114
  35. 117
  36. 60
  37. 80
  38. 124
  39. 100
  40. 59

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