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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 977 · 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. 1.86 + 43 =
  2. 2.86 + 69 =
  3. 3.47 + 35 =
  4. 4.67 + 14 =
  5. 5.63 + 22 =
  6. 6.75 + 57 =
  7. 7.54 + 21 =
  8. 8.77 + 25 =
  9. 9.25 + 12 =
  10. 10.31 + 72 =
  11. 11.84 + 24 =
  12. 12.35 + 83 =
  13. 13.46 + 69 =
  14. 14.66 + 61 =
  15. 15.39 + 34 =
  16. 16.28 + 84 =
  17. 17.24 + 31 =
  18. 18.75 + 25 =
  19. 19.34 + 41 =
  20. 20.64 + 27 =
  21. 21.59 + 29 =
  22. 22.48 + 84 =
  23. 23.82 + 58 =
  24. 24.41 + 34 =
  25. 25.81 + 77 =
  26. 26.81 + 58 =
  27. 27.89 + 42 =
  28. 28.76 + 12 =
  29. 29.77 + 75 =
  30. 30.54 + 79 =
  31. 31.42 + 31 =
  32. 32.36 + 82 =
  33. 33.78 + 21 =
  34. 34.66 + 57 =
  35. 35.83 + 63 =
  36. 36.28 + 26 =
  37. 37.22 + 31 =
  38. 38.45 + 14 =
  39. 39.23 + 66 =
  40. 40.69 + 64 =

Answer key

  1. 129
  2. 155
  3. 82
  4. 81
  5. 85
  6. 132
  7. 75
  8. 102
  9. 37
  10. 103
  11. 108
  12. 118
  13. 115
  14. 127
  15. 73
  16. 112
  17. 55
  18. 100
  19. 75
  20. 91
  21. 88
  22. 132
  23. 140
  24. 75
  25. 158
  26. 139
  27. 131
  28. 88
  29. 152
  30. 133
  31. 73
  32. 118
  33. 99
  34. 123
  35. 146
  36. 54
  37. 53
  38. 59
  39. 89
  40. 133

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