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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 595 · 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. 1.45 + 22 =
  2. 2.21 + 59 =
  3. 3.39 + 21 =
  4. 4.73 + 27 =
  5. 5.64 + 12 =
  6. 6.38 + 14 =
  7. 7.74 + 15 =
  8. 8.26 + 86 =
  9. 9.82 + 31 =
  10. 10.79 + 55 =
  11. 11.71 + 86 =
  12. 12.38 + 82 =
  13. 13.71 + 29 =
  14. 14.67 + 44 =
  15. 15.32 + 81 =
  16. 16.87 + 84 =
  17. 17.76 + 51 =
  18. 18.71 + 87 =
  19. 19.24 + 16 =
  20. 20.78 + 76 =
  21. 21.34 + 35 =
  22. 22.63 + 82 =
  23. 23.66 + 81 =
  24. 24.30 + 35 =
  25. 25.67 + 71 =
  26. 26.31 + 54 =
  27. 27.54 + 78 =
  28. 28.75 + 67 =
  29. 29.36 + 78 =
  30. 30.66 + 21 =
  31. 31.67 + 88 =
  32. 32.60 + 66 =
  33. 33.72 + 41 =
  34. 34.44 + 69 =
  35. 35.40 + 87 =
  36. 36.23 + 88 =
  37. 37.70 + 71 =
  38. 38.36 + 25 =
  39. 39.40 + 52 =
  40. 40.61 + 16 =

Answer key

  1. 67
  2. 80
  3. 60
  4. 100
  5. 76
  6. 52
  7. 89
  8. 112
  9. 113
  10. 134
  11. 157
  12. 120
  13. 100
  14. 111
  15. 113
  16. 171
  17. 127
  18. 158
  19. 40
  20. 154
  21. 69
  22. 145
  23. 147
  24. 65
  25. 138
  26. 85
  27. 132
  28. 142
  29. 114
  30. 87
  31. 155
  32. 126
  33. 113
  34. 113
  35. 127
  36. 111
  37. 141
  38. 61
  39. 92
  40. 77

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