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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 885 · 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. 1.57 + 47 =
  2. 2.41 + 77 =
  3. 3.58 + 81 =
  4. 4.77 + 82 =
  5. 5.22 + 43 =
  6. 6.68 + 75 =
  7. 7.85 + 45 =
  8. 8.39 + 51 =
  9. 9.38 + 41 =
  10. 10.44 + 19 =
  11. 11.74 + 44 =
  12. 12.81 + 21 =
  13. 13.72 + 14 =
  14. 14.78 + 43 =
  15. 15.23 + 23 =
  16. 16.65 + 27 =
  17. 17.48 + 85 =
  18. 18.78 + 76 =
  19. 19.36 + 71 =
  20. 20.71 + 64 =
  21. 21.53 + 37 =
  22. 22.47 + 33 =
  23. 23.50 + 14 =
  24. 24.77 + 17 =
  25. 25.72 + 31 =
  26. 26.33 + 41 =
  27. 27.53 + 43 =
  28. 28.82 + 17 =
  29. 29.88 + 13 =
  30. 30.88 + 15 =
  31. 31.33 + 55 =
  32. 32.79 + 38 =
  33. 33.26 + 61 =
  34. 34.83 + 84 =
  35. 35.58 + 63 =
  36. 36.77 + 87 =
  37. 37.44 + 48 =
  38. 38.68 + 27 =
  39. 39.67 + 32 =
  40. 40.74 + 89 =

Answer key

  1. 104
  2. 118
  3. 139
  4. 159
  5. 65
  6. 143
  7. 130
  8. 90
  9. 79
  10. 63
  11. 118
  12. 102
  13. 86
  14. 121
  15. 46
  16. 92
  17. 133
  18. 154
  19. 107
  20. 135
  21. 90
  22. 80
  23. 64
  24. 94
  25. 103
  26. 74
  27. 96
  28. 99
  29. 101
  30. 103
  31. 88
  32. 117
  33. 87
  34. 167
  35. 121
  36. 164
  37. 92
  38. 95
  39. 99
  40. 163

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