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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 920 · 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. 1.62 + 13 =
  2. 2.65 + 14 =
  3. 3.66 + 81 =
  4. 4.22 + 45 =
  5. 5.61 + 66 =
  6. 6.60 + 46 =
  7. 7.83 + 28 =
  8. 8.43 + 56 =
  9. 9.67 + 15 =
  10. 10.56 + 79 =
  11. 11.33 + 88 =
  12. 12.36 + 22 =
  13. 13.86 + 37 =
  14. 14.56 + 49 =
  15. 15.29 + 46 =
  16. 16.48 + 78 =
  17. 17.50 + 27 =
  18. 18.53 + 73 =
  19. 19.43 + 13 =
  20. 20.72 + 31 =
  21. 21.23 + 17 =
  22. 22.56 + 63 =
  23. 23.24 + 24 =
  24. 24.21 + 55 =
  25. 25.25 + 16 =
  26. 26.29 + 13 =
  27. 27.28 + 59 =
  28. 28.22 + 31 =
  29. 29.36 + 71 =
  30. 30.36 + 45 =
  31. 31.63 + 56 =
  32. 32.75 + 36 =
  33. 33.56 + 24 =
  34. 34.21 + 76 =
  35. 35.78 + 16 =
  36. 36.65 + 48 =
  37. 37.31 + 65 =
  38. 38.62 + 49 =
  39. 39.36 + 31 =
  40. 40.31 + 36 =

Answer key

  1. 75
  2. 79
  3. 147
  4. 67
  5. 127
  6. 106
  7. 111
  8. 99
  9. 82
  10. 135
  11. 121
  12. 58
  13. 123
  14. 105
  15. 75
  16. 126
  17. 77
  18. 126
  19. 56
  20. 103
  21. 40
  22. 119
  23. 48
  24. 76
  25. 41
  26. 42
  27. 87
  28. 53
  29. 107
  30. 81
  31. 119
  32. 111
  33. 80
  34. 97
  35. 94
  36. 113
  37. 96
  38. 111
  39. 67
  40. 67

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