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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 63 · 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. 1.37 + 17 =
  2. 2.46 + 87 =
  3. 3.71 + 89 =
  4. 4.36 + 43 =
  5. 5.32 + 41 =
  6. 6.75 + 49 =
  7. 7.62 + 25 =
  8. 8.27 + 22 =
  9. 9.66 + 14 =
  10. 10.28 + 76 =
  11. 11.70 + 64 =
  12. 12.56 + 76 =
  13. 13.39 + 18 =
  14. 14.37 + 32 =
  15. 15.45 + 59 =
  16. 16.39 + 55 =
  17. 17.89 + 84 =
  18. 18.40 + 55 =
  19. 19.75 + 31 =
  20. 20.60 + 18 =
  21. 21.69 + 67 =
  22. 22.34 + 68 =
  23. 23.41 + 29 =
  24. 24.72 + 26 =
  25. 25.83 + 25 =
  26. 26.61 + 46 =
  27. 27.39 + 79 =
  28. 28.71 + 69 =
  29. 29.52 + 23 =
  30. 30.56 + 14 =
  31. 31.30 + 12 =
  32. 32.41 + 27 =
  33. 33.51 + 12 =
  34. 34.21 + 41 =
  35. 35.84 + 54 =
  36. 36.78 + 31 =
  37. 37.29 + 32 =
  38. 38.23 + 89 =
  39. 39.31 + 59 =
  40. 40.21 + 73 =

Answer key

  1. 54
  2. 133
  3. 160
  4. 79
  5. 73
  6. 124
  7. 87
  8. 49
  9. 80
  10. 104
  11. 134
  12. 132
  13. 57
  14. 69
  15. 104
  16. 94
  17. 173
  18. 95
  19. 106
  20. 78
  21. 136
  22. 102
  23. 70
  24. 98
  25. 108
  26. 107
  27. 118
  28. 140
  29. 75
  30. 70
  31. 42
  32. 68
  33. 63
  34. 62
  35. 138
  36. 109
  37. 61
  38. 112
  39. 90
  40. 94

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