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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 785 · 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. 1.28 + 55 =
  2. 2.89 + 62 =
  3. 3.76 + 47 =
  4. 4.42 + 74 =
  5. 5.42 + 42 =
  6. 6.65 + 51 =
  7. 7.28 + 61 =
  8. 8.86 + 24 =
  9. 9.55 + 72 =
  10. 10.22 + 46 =
  11. 11.31 + 25 =
  12. 12.63 + 36 =
  13. 13.70 + 74 =
  14. 14.32 + 28 =
  15. 15.27 + 42 =
  16. 16.63 + 27 =
  17. 17.85 + 74 =
  18. 18.77 + 46 =
  19. 19.69 + 31 =
  20. 20.40 + 36 =
  21. 21.47 + 69 =
  22. 22.53 + 24 =
  23. 23.28 + 76 =
  24. 24.29 + 31 =
  25. 25.23 + 71 =
  26. 26.83 + 85 =
  27. 27.49 + 51 =
  28. 28.37 + 39 =
  29. 29.86 + 13 =
  30. 30.61 + 74 =
  31. 31.40 + 31 =
  32. 32.41 + 63 =
  33. 33.36 + 36 =
  34. 34.57 + 26 =
  35. 35.68 + 69 =
  36. 36.85 + 27 =
  37. 37.50 + 15 =
  38. 38.46 + 25 =
  39. 39.22 + 28 =
  40. 40.32 + 53 =

Answer key

  1. 83
  2. 151
  3. 123
  4. 116
  5. 84
  6. 116
  7. 89
  8. 110
  9. 127
  10. 68
  11. 56
  12. 99
  13. 144
  14. 60
  15. 69
  16. 90
  17. 159
  18. 123
  19. 100
  20. 76
  21. 116
  22. 77
  23. 104
  24. 60
  25. 94
  26. 168
  27. 100
  28. 76
  29. 99
  30. 135
  31. 71
  32. 104
  33. 72
  34. 83
  35. 137
  36. 112
  37. 65
  38. 71
  39. 50
  40. 85

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