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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 939 · 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. 1.79 + 67 =
  2. 2.28 + 67 =
  3. 3.32 + 81 =
  4. 4.31 + 42 =
  5. 5.75 + 87 =
  6. 6.68 + 84 =
  7. 7.40 + 23 =
  8. 8.21 + 31 =
  9. 9.36 + 24 =
  10. 10.24 + 81 =
  11. 11.30 + 28 =
  12. 12.83 + 49 =
  13. 13.46 + 28 =
  14. 14.32 + 41 =
  15. 15.31 + 62 =
  16. 16.77 + 64 =
  17. 17.69 + 83 =
  18. 18.54 + 87 =
  19. 19.46 + 55 =
  20. 20.26 + 68 =
  21. 21.59 + 57 =
  22. 22.25 + 42 =
  23. 23.21 + 85 =
  24. 24.83 + 78 =
  25. 25.79 + 74 =
  26. 26.59 + 24 =
  27. 27.85 + 39 =
  28. 28.46 + 52 =
  29. 29.81 + 69 =
  30. 30.85 + 14 =
  31. 31.76 + 42 =
  32. 32.80 + 48 =
  33. 33.27 + 37 =
  34. 34.65 + 52 =
  35. 35.33 + 87 =
  36. 36.42 + 57 =
  37. 37.22 + 41 =
  38. 38.36 + 15 =
  39. 39.46 + 35 =
  40. 40.89 + 36 =

Answer key

  1. 146
  2. 95
  3. 113
  4. 73
  5. 162
  6. 152
  7. 63
  8. 52
  9. 60
  10. 105
  11. 58
  12. 132
  13. 74
  14. 73
  15. 93
  16. 141
  17. 152
  18. 141
  19. 101
  20. 94
  21. 116
  22. 67
  23. 106
  24. 161
  25. 153
  26. 83
  27. 124
  28. 98
  29. 150
  30. 99
  31. 118
  32. 128
  33. 64
  34. 117
  35. 120
  36. 99
  37. 63
  38. 51
  39. 81
  40. 125

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