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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 733 · 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. 1.57 + 16 =
  2. 2.26 + 63 =
  3. 3.74 + 28 =
  4. 4.73 + 69 =
  5. 5.59 + 77 =
  6. 6.56 + 59 =
  7. 7.37 + 17 =
  8. 8.48 + 29 =
  9. 9.79 + 55 =
  10. 10.31 + 19 =
  11. 11.78 + 71 =
  12. 12.75 + 84 =
  13. 13.24 + 23 =
  14. 14.26 + 38 =
  15. 15.66 + 63 =
  16. 16.24 + 19 =
  17. 17.34 + 21 =
  18. 18.22 + 52 =
  19. 19.59 + 21 =
  20. 20.23 + 12 =
  21. 21.36 + 81 =
  22. 22.34 + 51 =
  23. 23.79 + 86 =
  24. 24.83 + 23 =
  25. 25.34 + 82 =
  26. 26.70 + 51 =
  27. 27.37 + 85 =
  28. 28.74 + 63 =
  29. 29.89 + 58 =
  30. 30.61 + 19 =
  31. 31.77 + 81 =
  32. 32.86 + 58 =
  33. 33.53 + 28 =
  34. 34.48 + 41 =
  35. 35.25 + 75 =
  36. 36.82 + 49 =
  37. 37.69 + 86 =
  38. 38.85 + 46 =
  39. 39.67 + 47 =
  40. 40.37 + 23 =

Answer key

  1. 73
  2. 89
  3. 102
  4. 142
  5. 136
  6. 115
  7. 54
  8. 77
  9. 134
  10. 50
  11. 149
  12. 159
  13. 47
  14. 64
  15. 129
  16. 43
  17. 55
  18. 74
  19. 80
  20. 35
  21. 117
  22. 85
  23. 165
  24. 106
  25. 116
  26. 121
  27. 122
  28. 137
  29. 147
  30. 80
  31. 158
  32. 144
  33. 81
  34. 89
  35. 100
  36. 131
  37. 155
  38. 131
  39. 114
  40. 60

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