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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 598 · 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. 1.62 + 84 =
  2. 2.32 + 63 =
  3. 3.82 + 51 =
  4. 4.45 + 14 =
  5. 5.29 + 56 =
  6. 6.42 + 88 =
  7. 7.23 + 39 =
  8. 8.59 + 52 =
  9. 9.89 + 51 =
  10. 10.71 + 23 =
  11. 11.76 + 31 =
  12. 12.32 + 87 =
  13. 13.76 + 14 =
  14. 14.41 + 77 =
  15. 15.81 + 52 =
  16. 16.33 + 69 =
  17. 17.35 + 55 =
  18. 18.37 + 42 =
  19. 19.46 + 16 =
  20. 20.79 + 31 =
  21. 21.26 + 27 =
  22. 22.52 + 12 =
  23. 23.74 + 42 =
  24. 24.79 + 21 =
  25. 25.32 + 62 =
  26. 26.62 + 87 =
  27. 27.79 + 47 =
  28. 28.37 + 27 =
  29. 29.88 + 48 =
  30. 30.66 + 36 =
  31. 31.49 + 36 =
  32. 32.87 + 41 =
  33. 33.85 + 54 =
  34. 34.49 + 47 =
  35. 35.66 + 87 =
  36. 36.28 + 16 =
  37. 37.36 + 35 =
  38. 38.32 + 36 =
  39. 39.61 + 84 =
  40. 40.64 + 57 =

Answer key

  1. 146
  2. 95
  3. 133
  4. 59
  5. 85
  6. 130
  7. 62
  8. 111
  9. 140
  10. 94
  11. 107
  12. 119
  13. 90
  14. 118
  15. 133
  16. 102
  17. 90
  18. 79
  19. 62
  20. 110
  21. 53
  22. 64
  23. 116
  24. 100
  25. 94
  26. 149
  27. 126
  28. 64
  29. 136
  30. 102
  31. 85
  32. 128
  33. 139
  34. 96
  35. 153
  36. 44
  37. 71
  38. 68
  39. 145
  40. 121

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