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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 56 · 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. 1.76 + 31 =
  2. 2.81 + 69 =
  3. 3.61 + 74 =
  4. 4.79 + 41 =
  5. 5.36 + 52 =
  6. 6.62 + 86 =
  7. 7.80 + 75 =
  8. 8.66 + 69 =
  9. 9.87 + 65 =
  10. 10.89 + 34 =
  11. 11.43 + 76 =
  12. 12.58 + 76 =
  13. 13.89 + 61 =
  14. 14.47 + 47 =
  15. 15.32 + 58 =
  16. 16.89 + 26 =
  17. 17.42 + 47 =
  18. 18.33 + 68 =
  19. 19.35 + 34 =
  20. 20.73 + 12 =
  21. 21.57 + 26 =
  22. 22.54 + 24 =
  23. 23.54 + 14 =
  24. 24.47 + 71 =
  25. 25.26 + 35 =
  26. 26.39 + 87 =
  27. 27.46 + 39 =
  28. 28.30 + 29 =
  29. 29.26 + 36 =
  30. 30.77 + 21 =
  31. 31.36 + 79 =
  32. 32.22 + 69 =
  33. 33.34 + 31 =
  34. 34.54 + 67 =
  35. 35.42 + 17 =
  36. 36.30 + 67 =
  37. 37.47 + 22 =
  38. 38.58 + 47 =
  39. 39.45 + 35 =
  40. 40.59 + 54 =

Answer key

  1. 107
  2. 150
  3. 135
  4. 120
  5. 88
  6. 148
  7. 155
  8. 135
  9. 152
  10. 123
  11. 119
  12. 134
  13. 150
  14. 94
  15. 90
  16. 115
  17. 89
  18. 101
  19. 69
  20. 85
  21. 83
  22. 78
  23. 68
  24. 118
  25. 61
  26. 126
  27. 85
  28. 59
  29. 62
  30. 98
  31. 115
  32. 91
  33. 65
  34. 121
  35. 59
  36. 97
  37. 69
  38. 105
  39. 80
  40. 113

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