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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 106 · 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. 1.56 + 47 =
  2. 2.89 + 71 =
  3. 3.61 + 23 =
  4. 4.48 + 76 =
  5. 5.52 + 36 =
  6. 6.23 + 23 =
  7. 7.71 + 29 =
  8. 8.48 + 64 =
  9. 9.53 + 33 =
  10. 10.33 + 35 =
  11. 11.79 + 77 =
  12. 12.26 + 55 =
  13. 13.51 + 31 =
  14. 14.49 + 78 =
  15. 15.77 + 56 =
  16. 16.24 + 38 =
  17. 17.49 + 88 =
  18. 18.32 + 17 =
  19. 19.32 + 13 =
  20. 20.32 + 81 =
  21. 21.43 + 39 =
  22. 22.86 + 48 =
  23. 23.26 + 84 =
  24. 24.25 + 56 =
  25. 25.28 + 72 =
  26. 26.41 + 81 =
  27. 27.22 + 73 =
  28. 28.32 + 12 =
  29. 29.83 + 21 =
  30. 30.85 + 51 =
  31. 31.54 + 52 =
  32. 32.35 + 37 =
  33. 33.29 + 61 =
  34. 34.81 + 38 =
  35. 35.88 + 67 =
  36. 36.78 + 77 =
  37. 37.55 + 69 =
  38. 38.64 + 63 =
  39. 39.61 + 52 =
  40. 40.75 + 83 =

Answer key

  1. 103
  2. 160
  3. 84
  4. 124
  5. 88
  6. 46
  7. 100
  8. 112
  9. 86
  10. 68
  11. 156
  12. 81
  13. 82
  14. 127
  15. 133
  16. 62
  17. 137
  18. 49
  19. 45
  20. 113
  21. 82
  22. 134
  23. 110
  24. 81
  25. 100
  26. 122
  27. 95
  28. 44
  29. 104
  30. 136
  31. 106
  32. 72
  33. 90
  34. 119
  35. 155
  36. 155
  37. 124
  38. 127
  39. 113
  40. 158

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