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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 356 · 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 + 61 =
  2. 2.87 + 17 =
  3. 3.21 + 87 =
  4. 4.35 + 81 =
  5. 5.46 + 44 =
  6. 6.84 + 68 =
  7. 7.63 + 18 =
  8. 8.71 + 87 =
  9. 9.59 + 21 =
  10. 10.62 + 46 =
  11. 11.73 + 46 =
  12. 12.34 + 75 =
  13. 13.28 + 83 =
  14. 14.49 + 39 =
  15. 15.34 + 29 =
  16. 16.24 + 29 =
  17. 17.41 + 34 =
  18. 18.70 + 26 =
  19. 19.89 + 72 =
  20. 20.48 + 12 =
  21. 21.81 + 29 =
  22. 22.42 + 36 =
  23. 23.23 + 75 =
  24. 24.26 + 19 =
  25. 25.56 + 14 =
  26. 26.43 + 76 =
  27. 27.37 + 46 =
  28. 28.21 + 61 =
  29. 29.80 + 16 =
  30. 30.54 + 42 =
  31. 31.37 + 24 =
  32. 32.32 + 59 =
  33. 33.40 + 51 =
  34. 34.60 + 64 =
  35. 35.40 + 26 =
  36. 36.71 + 24 =
  37. 37.37 + 12 =
  38. 38.22 + 81 =
  39. 39.72 + 84 =
  40. 40.62 + 27 =

Answer key

  1. 95
  2. 104
  3. 108
  4. 116
  5. 90
  6. 152
  7. 81
  8. 158
  9. 80
  10. 108
  11. 119
  12. 109
  13. 111
  14. 88
  15. 63
  16. 53
  17. 75
  18. 96
  19. 161
  20. 60
  21. 110
  22. 78
  23. 98
  24. 45
  25. 70
  26. 119
  27. 83
  28. 82
  29. 96
  30. 96
  31. 61
  32. 91
  33. 91
  34. 124
  35. 66
  36. 95
  37. 49
  38. 103
  39. 156
  40. 89

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