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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 423 · 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. 1.63 + 85 =
  2. 2.49 + 16 =
  3. 3.61 + 37 =
  4. 4.59 + 81 =
  5. 5.85 + 29 =
  6. 6.42 + 77 =
  7. 7.73 + 54 =
  8. 8.66 + 29 =
  9. 9.47 + 38 =
  10. 10.72 + 72 =
  11. 11.26 + 64 =
  12. 12.51 + 78 =
  13. 13.54 + 18 =
  14. 14.27 + 22 =
  15. 15.24 + 74 =
  16. 16.53 + 24 =
  17. 17.24 + 46 =
  18. 18.55 + 45 =
  19. 19.35 + 14 =
  20. 20.69 + 15 =
  21. 21.57 + 88 =
  22. 22.66 + 82 =
  23. 23.45 + 31 =
  24. 24.23 + 54 =
  25. 25.33 + 24 =
  26. 26.63 + 44 =
  27. 27.79 + 28 =
  28. 28.51 + 39 =
  29. 29.82 + 26 =
  30. 30.37 + 16 =
  31. 31.27 + 61 =
  32. 32.49 + 44 =
  33. 33.43 + 56 =
  34. 34.23 + 15 =
  35. 35.27 + 31 =
  36. 36.73 + 62 =
  37. 37.58 + 39 =
  38. 38.81 + 45 =
  39. 39.65 + 62 =
  40. 40.58 + 72 =

Answer key

  1. 148
  2. 65
  3. 98
  4. 140
  5. 114
  6. 119
  7. 127
  8. 95
  9. 85
  10. 144
  11. 90
  12. 129
  13. 72
  14. 49
  15. 98
  16. 77
  17. 70
  18. 100
  19. 49
  20. 84
  21. 145
  22. 148
  23. 76
  24. 77
  25. 57
  26. 107
  27. 107
  28. 90
  29. 108
  30. 53
  31. 88
  32. 93
  33. 99
  34. 38
  35. 58
  36. 135
  37. 97
  38. 126
  39. 127
  40. 130

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