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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 856 · 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. 1.52 + 89 =
  2. 2.25 + 35 =
  3. 3.57 + 89 =
  4. 4.51 + 53 =
  5. 5.68 + 83 =
  6. 6.38 + 29 =
  7. 7.26 + 24 =
  8. 8.33 + 25 =
  9. 9.32 + 39 =
  10. 10.58 + 66 =
  11. 11.83 + 87 =
  12. 12.53 + 51 =
  13. 13.28 + 24 =
  14. 14.41 + 37 =
  15. 15.64 + 53 =
  16. 16.42 + 85 =
  17. 17.47 + 21 =
  18. 18.57 + 54 =
  19. 19.40 + 82 =
  20. 20.31 + 19 =
  21. 21.25 + 57 =
  22. 22.38 + 83 =
  23. 23.55 + 32 =
  24. 24.26 + 51 =
  25. 25.89 + 84 =
  26. 26.56 + 48 =
  27. 27.68 + 52 =
  28. 28.31 + 48 =
  29. 29.30 + 79 =
  30. 30.61 + 82 =
  31. 31.46 + 65 =
  32. 32.85 + 15 =
  33. 33.72 + 44 =
  34. 34.75 + 44 =
  35. 35.74 + 59 =
  36. 36.84 + 72 =
  37. 37.35 + 39 =
  38. 38.43 + 43 =
  39. 39.88 + 46 =
  40. 40.89 + 26 =

Answer key

  1. 141
  2. 60
  3. 146
  4. 104
  5. 151
  6. 67
  7. 50
  8. 58
  9. 71
  10. 124
  11. 170
  12. 104
  13. 52
  14. 78
  15. 117
  16. 127
  17. 68
  18. 111
  19. 122
  20. 50
  21. 82
  22. 121
  23. 87
  24. 77
  25. 173
  26. 104
  27. 120
  28. 79
  29. 109
  30. 143
  31. 111
  32. 100
  33. 116
  34. 119
  35. 133
  36. 156
  37. 74
  38. 86
  39. 134
  40. 115

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