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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 868 · 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. 1.73 + 88 =
  2. 2.87 + 59 =
  3. 3.49 + 26 =
  4. 4.26 + 63 =
  5. 5.54 + 21 =
  6. 6.34 + 13 =
  7. 7.22 + 65 =
  8. 8.60 + 17 =
  9. 9.48 + 81 =
  10. 10.86 + 67 =
  11. 11.73 + 73 =
  12. 12.39 + 27 =
  13. 13.42 + 63 =
  14. 14.29 + 14 =
  15. 15.22 + 18 =
  16. 16.25 + 44 =
  17. 17.28 + 58 =
  18. 18.31 + 61 =
  19. 19.68 + 65 =
  20. 20.22 + 32 =
  21. 21.44 + 66 =
  22. 22.61 + 75 =
  23. 23.64 + 13 =
  24. 24.79 + 46 =
  25. 25.39 + 43 =
  26. 26.67 + 48 =
  27. 27.42 + 56 =
  28. 28.84 + 31 =
  29. 29.50 + 63 =
  30. 30.66 + 24 =
  31. 31.25 + 64 =
  32. 32.46 + 56 =
  33. 33.49 + 41 =
  34. 34.65 + 13 =
  35. 35.84 + 43 =
  36. 36.35 + 82 =
  37. 37.25 + 52 =
  38. 38.43 + 36 =
  39. 39.22 + 23 =
  40. 40.62 + 55 =

Answer key

  1. 161
  2. 146
  3. 75
  4. 89
  5. 75
  6. 47
  7. 87
  8. 77
  9. 129
  10. 153
  11. 146
  12. 66
  13. 105
  14. 43
  15. 40
  16. 69
  17. 86
  18. 92
  19. 133
  20. 54
  21. 110
  22. 136
  23. 77
  24. 125
  25. 82
  26. 115
  27. 98
  28. 115
  29. 113
  30. 90
  31. 89
  32. 102
  33. 90
  34. 78
  35. 127
  36. 117
  37. 77
  38. 79
  39. 45
  40. 117

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