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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 648 · 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. 1.79 + 45 =
  2. 2.31 + 67 =
  3. 3.22 + 22 =
  4. 4.32 + 29 =
  5. 5.37 + 89 =
  6. 6.45 + 76 =
  7. 7.88 + 25 =
  8. 8.75 + 49 =
  9. 9.47 + 46 =
  10. 10.56 + 41 =
  11. 11.26 + 61 =
  12. 12.29 + 49 =
  13. 13.49 + 58 =
  14. 14.36 + 37 =
  15. 15.85 + 35 =
  16. 16.33 + 33 =
  17. 17.30 + 31 =
  18. 18.54 + 56 =
  19. 19.26 + 22 =
  20. 20.44 + 88 =
  21. 21.35 + 66 =
  22. 22.80 + 41 =
  23. 23.23 + 62 =
  24. 24.49 + 16 =
  25. 25.44 + 31 =
  26. 26.49 + 44 =
  27. 27.31 + 43 =
  28. 28.84 + 71 =
  29. 29.40 + 72 =
  30. 30.22 + 25 =
  31. 31.66 + 83 =
  32. 32.89 + 65 =
  33. 33.69 + 34 =
  34. 34.42 + 81 =
  35. 35.36 + 39 =
  36. 36.25 + 57 =
  37. 37.69 + 45 =
  38. 38.43 + 14 =
  39. 39.84 + 55 =
  40. 40.77 + 89 =

Answer key

  1. 124
  2. 98
  3. 44
  4. 61
  5. 126
  6. 121
  7. 113
  8. 124
  9. 93
  10. 97
  11. 87
  12. 78
  13. 107
  14. 73
  15. 120
  16. 66
  17. 61
  18. 110
  19. 48
  20. 132
  21. 101
  22. 121
  23. 85
  24. 65
  25. 75
  26. 93
  27. 74
  28. 155
  29. 112
  30. 47
  31. 149
  32. 154
  33. 103
  34. 123
  35. 75
  36. 82
  37. 114
  38. 57
  39. 139
  40. 166

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