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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 899 · 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. 1.84 + 22 =
  2. 2.31 + 29 =
  3. 3.45 + 63 =
  4. 4.30 + 51 =
  5. 5.71 + 75 =
  6. 6.23 + 75 =
  7. 7.70 + 54 =
  8. 8.43 + 61 =
  9. 9.45 + 46 =
  10. 10.29 + 82 =
  11. 11.32 + 78 =
  12. 12.60 + 74 =
  13. 13.35 + 77 =
  14. 14.36 + 39 =
  15. 15.45 + 47 =
  16. 16.78 + 58 =
  17. 17.49 + 15 =
  18. 18.74 + 56 =
  19. 19.39 + 12 =
  20. 20.32 + 84 =
  21. 21.52 + 28 =
  22. 22.48 + 79 =
  23. 23.58 + 34 =
  24. 24.85 + 49 =
  25. 25.27 + 22 =
  26. 26.48 + 54 =
  27. 27.59 + 81 =
  28. 28.23 + 73 =
  29. 29.64 + 65 =
  30. 30.42 + 79 =
  31. 31.81 + 59 =
  32. 32.39 + 71 =
  33. 33.64 + 47 =
  34. 34.80 + 54 =
  35. 35.33 + 15 =
  36. 36.21 + 65 =
  37. 37.86 + 75 =
  38. 38.29 + 81 =
  39. 39.75 + 33 =
  40. 40.28 + 72 =

Answer key

  1. 106
  2. 60
  3. 108
  4. 81
  5. 146
  6. 98
  7. 124
  8. 104
  9. 91
  10. 111
  11. 110
  12. 134
  13. 112
  14. 75
  15. 92
  16. 136
  17. 64
  18. 130
  19. 51
  20. 116
  21. 80
  22. 127
  23. 92
  24. 134
  25. 49
  26. 102
  27. 140
  28. 96
  29. 129
  30. 121
  31. 140
  32. 110
  33. 111
  34. 134
  35. 48
  36. 86
  37. 161
  38. 110
  39. 108
  40. 100

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