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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 77 · 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. 1.34 + 85 =
  2. 2.45 + 13 =
  3. 3.28 + 37 =
  4. 4.21 + 57 =
  5. 5.27 + 77 =
  6. 6.34 + 49 =
  7. 7.52 + 46 =
  8. 8.37 + 21 =
  9. 9.41 + 21 =
  10. 10.76 + 33 =
  11. 11.47 + 51 =
  12. 12.73 + 32 =
  13. 13.65 + 21 =
  14. 14.26 + 15 =
  15. 15.32 + 65 =
  16. 16.33 + 42 =
  17. 17.32 + 66 =
  18. 18.87 + 34 =
  19. 19.44 + 55 =
  20. 20.45 + 54 =
  21. 21.49 + 87 =
  22. 22.52 + 58 =
  23. 23.42 + 18 =
  24. 24.85 + 67 =
  25. 25.54 + 88 =
  26. 26.47 + 86 =
  27. 27.35 + 15 =
  28. 28.80 + 22 =
  29. 29.49 + 12 =
  30. 30.30 + 45 =
  31. 31.85 + 43 =
  32. 32.71 + 37 =
  33. 33.83 + 33 =
  34. 34.34 + 78 =
  35. 35.25 + 13 =
  36. 36.82 + 56 =
  37. 37.24 + 78 =
  38. 38.88 + 28 =
  39. 39.58 + 64 =
  40. 40.34 + 12 =

Answer key

  1. 119
  2. 58
  3. 65
  4. 78
  5. 104
  6. 83
  7. 98
  8. 58
  9. 62
  10. 109
  11. 98
  12. 105
  13. 86
  14. 41
  15. 97
  16. 75
  17. 98
  18. 121
  19. 99
  20. 99
  21. 136
  22. 110
  23. 60
  24. 152
  25. 142
  26. 133
  27. 50
  28. 102
  29. 61
  30. 75
  31. 128
  32. 108
  33. 116
  34. 112
  35. 38
  36. 138
  37. 102
  38. 116
  39. 122
  40. 46

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