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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 968 · 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. 1.34 + 21 =
  2. 2.34 + 39 =
  3. 3.56 + 23 =
  4. 4.39 + 61 =
  5. 5.59 + 87 =
  6. 6.56 + 19 =
  7. 7.26 + 15 =
  8. 8.81 + 24 =
  9. 9.89 + 68 =
  10. 10.78 + 51 =
  11. 11.85 + 43 =
  12. 12.84 + 28 =
  13. 13.30 + 54 =
  14. 14.78 + 55 =
  15. 15.79 + 27 =
  16. 16.52 + 64 =
  17. 17.38 + 24 =
  18. 18.23 + 36 =
  19. 19.77 + 35 =
  20. 20.21 + 74 =
  21. 21.50 + 26 =
  22. 22.30 + 79 =
  23. 23.49 + 34 =
  24. 24.84 + 53 =
  25. 25.45 + 25 =
  26. 26.30 + 46 =
  27. 27.75 + 36 =
  28. 28.64 + 32 =
  29. 29.64 + 87 =
  30. 30.55 + 51 =
  31. 31.35 + 72 =
  32. 32.88 + 14 =
  33. 33.22 + 71 =
  34. 34.68 + 75 =
  35. 35.36 + 38 =
  36. 36.67 + 57 =
  37. 37.55 + 68 =
  38. 38.50 + 42 =
  39. 39.86 + 46 =
  40. 40.53 + 84 =

Answer key

  1. 55
  2. 73
  3. 79
  4. 100
  5. 146
  6. 75
  7. 41
  8. 105
  9. 157
  10. 129
  11. 128
  12. 112
  13. 84
  14. 133
  15. 106
  16. 116
  17. 62
  18. 59
  19. 112
  20. 95
  21. 76
  22. 109
  23. 83
  24. 137
  25. 70
  26. 76
  27. 111
  28. 96
  29. 151
  30. 106
  31. 107
  32. 102
  33. 93
  34. 143
  35. 74
  36. 124
  37. 123
  38. 92
  39. 132
  40. 137

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