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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 827 · 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. 1.89 + 13 =
  2. 2.49 + 61 =
  3. 3.89 + 16 =
  4. 4.50 + 79 =
  5. 5.76 + 44 =
  6. 6.88 + 39 =
  7. 7.26 + 54 =
  8. 8.54 + 67 =
  9. 9.23 + 34 =
  10. 10.38 + 89 =
  11. 11.54 + 72 =
  12. 12.29 + 15 =
  13. 13.78 + 25 =
  14. 14.43 + 59 =
  15. 15.88 + 66 =
  16. 16.57 + 31 =
  17. 17.85 + 76 =
  18. 18.48 + 63 =
  19. 19.72 + 63 =
  20. 20.29 + 43 =
  21. 21.75 + 46 =
  22. 22.48 + 27 =
  23. 23.32 + 84 =
  24. 24.37 + 72 =
  25. 25.69 + 46 =
  26. 26.84 + 23 =
  27. 27.68 + 89 =
  28. 28.59 + 65 =
  29. 29.76 + 77 =
  30. 30.45 + 23 =
  31. 31.23 + 53 =
  32. 32.85 + 61 =
  33. 33.22 + 25 =
  34. 34.28 + 41 =
  35. 35.44 + 16 =
  36. 36.82 + 59 =
  37. 37.28 + 28 =
  38. 38.22 + 32 =
  39. 39.40 + 75 =
  40. 40.28 + 69 =

Answer key

  1. 102
  2. 110
  3. 105
  4. 129
  5. 120
  6. 127
  7. 80
  8. 121
  9. 57
  10. 127
  11. 126
  12. 44
  13. 103
  14. 102
  15. 154
  16. 88
  17. 161
  18. 111
  19. 135
  20. 72
  21. 121
  22. 75
  23. 116
  24. 109
  25. 115
  26. 107
  27. 157
  28. 124
  29. 153
  30. 68
  31. 76
  32. 146
  33. 47
  34. 69
  35. 60
  36. 141
  37. 56
  38. 54
  39. 115
  40. 97

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