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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 912 · 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. 1.54 + 51 =
  2. 2.30 + 41 =
  3. 3.82 + 86 =
  4. 4.60 + 51 =
  5. 5.72 + 34 =
  6. 6.36 + 49 =
  7. 7.71 + 71 =
  8. 8.30 + 23 =
  9. 9.83 + 42 =
  10. 10.39 + 29 =
  11. 11.41 + 44 =
  12. 12.27 + 41 =
  13. 13.66 + 13 =
  14. 14.77 + 23 =
  15. 15.78 + 57 =
  16. 16.53 + 18 =
  17. 17.44 + 42 =
  18. 18.38 + 44 =
  19. 19.29 + 73 =
  20. 20.71 + 48 =
  21. 21.73 + 35 =
  22. 22.72 + 35 =
  23. 23.31 + 81 =
  24. 24.32 + 16 =
  25. 25.47 + 39 =
  26. 26.25 + 24 =
  27. 27.26 + 45 =
  28. 28.62 + 38 =
  29. 29.23 + 72 =
  30. 30.55 + 62 =
  31. 31.74 + 67 =
  32. 32.88 + 83 =
  33. 33.64 + 31 =
  34. 34.59 + 15 =
  35. 35.40 + 26 =
  36. 36.84 + 21 =
  37. 37.41 + 26 =
  38. 38.85 + 28 =
  39. 39.60 + 83 =
  40. 40.41 + 31 =

Answer key

  1. 105
  2. 71
  3. 168
  4. 111
  5. 106
  6. 85
  7. 142
  8. 53
  9. 125
  10. 68
  11. 85
  12. 68
  13. 79
  14. 100
  15. 135
  16. 71
  17. 86
  18. 82
  19. 102
  20. 119
  21. 108
  22. 107
  23. 112
  24. 48
  25. 86
  26. 49
  27. 71
  28. 100
  29. 95
  30. 117
  31. 141
  32. 171
  33. 95
  34. 74
  35. 66
  36. 105
  37. 67
  38. 113
  39. 143
  40. 72

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