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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 858 · 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. 1.24 + 48 =
  2. 2.42 + 32 =
  3. 3.47 + 24 =
  4. 4.68 + 21 =
  5. 5.71 + 29 =
  6. 6.78 + 39 =
  7. 7.44 + 72 =
  8. 8.88 + 48 =
  9. 9.46 + 51 =
  10. 10.85 + 67 =
  11. 11.39 + 47 =
  12. 12.67 + 14 =
  13. 13.51 + 62 =
  14. 14.43 + 17 =
  15. 15.28 + 25 =
  16. 16.29 + 65 =
  17. 17.83 + 73 =
  18. 18.53 + 61 =
  19. 19.43 + 18 =
  20. 20.70 + 73 =
  21. 21.27 + 54 =
  22. 22.66 + 64 =
  23. 23.33 + 81 =
  24. 24.52 + 43 =
  25. 25.24 + 44 =
  26. 26.27 + 31 =
  27. 27.83 + 31 =
  28. 28.88 + 82 =
  29. 29.65 + 32 =
  30. 30.61 + 61 =
  31. 31.22 + 24 =
  32. 32.24 + 63 =
  33. 33.21 + 32 =
  34. 34.37 + 59 =
  35. 35.53 + 12 =
  36. 36.62 + 46 =
  37. 37.66 + 83 =
  38. 38.84 + 61 =
  39. 39.67 + 35 =
  40. 40.73 + 82 =

Answer key

  1. 72
  2. 74
  3. 71
  4. 89
  5. 100
  6. 117
  7. 116
  8. 136
  9. 97
  10. 152
  11. 86
  12. 81
  13. 113
  14. 60
  15. 53
  16. 94
  17. 156
  18. 114
  19. 61
  20. 143
  21. 81
  22. 130
  23. 114
  24. 95
  25. 68
  26. 58
  27. 114
  28. 170
  29. 97
  30. 122
  31. 46
  32. 87
  33. 53
  34. 96
  35. 65
  36. 108
  37. 149
  38. 145
  39. 102
  40. 155

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