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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 600 · 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. 1.79 + 26 =
  2. 2.21 + 81 =
  3. 3.22 + 15 =
  4. 4.62 + 42 =
  5. 5.37 + 85 =
  6. 6.87 + 36 =
  7. 7.41 + 81 =
  8. 8.39 + 86 =
  9. 9.39 + 22 =
  10. 10.74 + 52 =
  11. 11.65 + 69 =
  12. 12.22 + 78 =
  13. 13.74 + 17 =
  14. 14.74 + 81 =
  15. 15.30 + 17 =
  16. 16.41 + 32 =
  17. 17.81 + 28 =
  18. 18.43 + 56 =
  19. 19.84 + 76 =
  20. 20.26 + 71 =
  21. 21.54 + 88 =
  22. 22.88 + 41 =
  23. 23.21 + 12 =
  24. 24.50 + 55 =
  25. 25.26 + 57 =
  26. 26.36 + 21 =
  27. 27.86 + 59 =
  28. 28.23 + 42 =
  29. 29.74 + 47 =
  30. 30.63 + 58 =
  31. 31.38 + 69 =
  32. 32.34 + 46 =
  33. 33.32 + 85 =
  34. 34.56 + 74 =
  35. 35.73 + 61 =
  36. 36.86 + 81 =
  37. 37.57 + 56 =
  38. 38.30 + 41 =
  39. 39.61 + 47 =
  40. 40.34 + 49 =

Answer key

  1. 105
  2. 102
  3. 37
  4. 104
  5. 122
  6. 123
  7. 122
  8. 125
  9. 61
  10. 126
  11. 134
  12. 100
  13. 91
  14. 155
  15. 47
  16. 73
  17. 109
  18. 99
  19. 160
  20. 97
  21. 142
  22. 129
  23. 33
  24. 105
  25. 83
  26. 57
  27. 145
  28. 65
  29. 121
  30. 121
  31. 107
  32. 80
  33. 117
  34. 130
  35. 134
  36. 167
  37. 113
  38. 71
  39. 108
  40. 83

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