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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 498 · 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. 1.73 + 21 =
  2. 2.73 + 82 =
  3. 3.59 + 22 =
  4. 4.78 + 58 =
  5. 5.24 + 35 =
  6. 6.80 + 43 =
  7. 7.85 + 58 =
  8. 8.27 + 47 =
  9. 9.49 + 75 =
  10. 10.80 + 18 =
  11. 11.52 + 12 =
  12. 12.32 + 23 =
  13. 13.58 + 47 =
  14. 14.88 + 17 =
  15. 15.45 + 31 =
  16. 16.75 + 52 =
  17. 17.59 + 24 =
  18. 18.28 + 88 =
  19. 19.44 + 77 =
  20. 20.54 + 35 =
  21. 21.28 + 82 =
  22. 22.22 + 65 =
  23. 23.85 + 39 =
  24. 24.31 + 43 =
  25. 25.57 + 85 =
  26. 26.35 + 52 =
  27. 27.48 + 45 =
  28. 28.66 + 45 =
  29. 29.87 + 25 =
  30. 30.51 + 71 =
  31. 31.83 + 15 =
  32. 32.51 + 51 =
  33. 33.35 + 12 =
  34. 34.84 + 68 =
  35. 35.24 + 13 =
  36. 36.45 + 62 =
  37. 37.24 + 62 =
  38. 38.62 + 41 =
  39. 39.56 + 51 =
  40. 40.61 + 85 =

Answer key

  1. 94
  2. 155
  3. 81
  4. 136
  5. 59
  6. 123
  7. 143
  8. 74
  9. 124
  10. 98
  11. 64
  12. 55
  13. 105
  14. 105
  15. 76
  16. 127
  17. 83
  18. 116
  19. 121
  20. 89
  21. 110
  22. 87
  23. 124
  24. 74
  25. 142
  26. 87
  27. 93
  28. 111
  29. 112
  30. 122
  31. 98
  32. 102
  33. 47
  34. 152
  35. 37
  36. 107
  37. 86
  38. 103
  39. 107
  40. 146

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