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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 972 · 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. 1.33 + 59 =
  2. 2.65 + 21 =
  3. 3.73 + 39 =
  4. 4.21 + 24 =
  5. 5.76 + 52 =
  6. 6.79 + 46 =
  7. 7.81 + 36 =
  8. 8.82 + 66 =
  9. 9.31 + 61 =
  10. 10.46 + 54 =
  11. 11.78 + 16 =
  12. 12.28 + 22 =
  13. 13.28 + 29 =
  14. 14.76 + 25 =
  15. 15.24 + 19 =
  16. 16.66 + 36 =
  17. 17.23 + 45 =
  18. 18.49 + 84 =
  19. 19.54 + 52 =
  20. 20.30 + 32 =
  21. 21.81 + 61 =
  22. 22.39 + 21 =
  23. 23.80 + 17 =
  24. 24.80 + 31 =
  25. 25.85 + 23 =
  26. 26.42 + 27 =
  27. 27.32 + 75 =
  28. 28.70 + 32 =
  29. 29.65 + 38 =
  30. 30.38 + 76 =
  31. 31.55 + 27 =
  32. 32.24 + 59 =
  33. 33.64 + 54 =
  34. 34.25 + 19 =
  35. 35.30 + 18 =
  36. 36.88 + 14 =
  37. 37.43 + 34 =
  38. 38.62 + 58 =
  39. 39.79 + 39 =
  40. 40.75 + 37 =

Answer key

  1. 92
  2. 86
  3. 112
  4. 45
  5. 128
  6. 125
  7. 117
  8. 148
  9. 92
  10. 100
  11. 94
  12. 50
  13. 57
  14. 101
  15. 43
  16. 102
  17. 68
  18. 133
  19. 106
  20. 62
  21. 142
  22. 60
  23. 97
  24. 111
  25. 108
  26. 69
  27. 107
  28. 102
  29. 103
  30. 114
  31. 82
  32. 83
  33. 118
  34. 44
  35. 48
  36. 102
  37. 77
  38. 120
  39. 118
  40. 112

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