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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 478 · 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. 1.41 + 51 =
  2. 2.86 + 89 =
  3. 3.23 + 64 =
  4. 4.35 + 89 =
  5. 5.43 + 26 =
  6. 6.73 + 77 =
  7. 7.73 + 49 =
  8. 8.31 + 68 =
  9. 9.40 + 34 =
  10. 10.26 + 67 =
  11. 11.70 + 41 =
  12. 12.83 + 47 =
  13. 13.25 + 19 =
  14. 14.74 + 84 =
  15. 15.23 + 21 =
  16. 16.30 + 41 =
  17. 17.40 + 19 =
  18. 18.73 + 61 =
  19. 19.56 + 51 =
  20. 20.86 + 55 =
  21. 21.51 + 69 =
  22. 22.61 + 56 =
  23. 23.42 + 45 =
  24. 24.70 + 53 =
  25. 25.52 + 68 =
  26. 26.81 + 37 =
  27. 27.31 + 21 =
  28. 28.64 + 66 =
  29. 29.80 + 83 =
  30. 30.28 + 51 =
  31. 31.53 + 89 =
  32. 32.38 + 26 =
  33. 33.39 + 52 =
  34. 34.46 + 41 =
  35. 35.78 + 64 =
  36. 36.65 + 87 =
  37. 37.55 + 87 =
  38. 38.22 + 29 =
  39. 39.47 + 45 =
  40. 40.74 + 61 =

Answer key

  1. 92
  2. 175
  3. 87
  4. 124
  5. 69
  6. 150
  7. 122
  8. 99
  9. 74
  10. 93
  11. 111
  12. 130
  13. 44
  14. 158
  15. 44
  16. 71
  17. 59
  18. 134
  19. 107
  20. 141
  21. 120
  22. 117
  23. 87
  24. 123
  25. 120
  26. 118
  27. 52
  28. 130
  29. 163
  30. 79
  31. 142
  32. 64
  33. 91
  34. 87
  35. 142
  36. 152
  37. 142
  38. 51
  39. 92
  40. 135

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