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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 844 · 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 + 71 =
  2. 2.41 + 12 =
  3. 3.25 + 26 =
  4. 4.67 + 48 =
  5. 5.26 + 31 =
  6. 6.69 + 74 =
  7. 7.83 + 74 =
  8. 8.50 + 71 =
  9. 9.26 + 34 =
  10. 10.24 + 45 =
  11. 11.26 + 25 =
  12. 12.61 + 83 =
  13. 13.36 + 87 =
  14. 14.28 + 44 =
  15. 15.41 + 13 =
  16. 16.39 + 56 =
  17. 17.60 + 28 =
  18. 18.87 + 81 =
  19. 19.26 + 42 =
  20. 20.37 + 77 =
  21. 21.56 + 31 =
  22. 22.87 + 47 =
  23. 23.36 + 34 =
  24. 24.42 + 85 =
  25. 25.76 + 72 =
  26. 26.88 + 78 =
  27. 27.38 + 41 =
  28. 28.88 + 42 =
  29. 29.82 + 33 =
  30. 30.55 + 16 =
  31. 31.89 + 19 =
  32. 32.60 + 32 =
  33. 33.37 + 71 =
  34. 34.81 + 22 =
  35. 35.31 + 81 =
  36. 36.24 + 33 =
  37. 37.58 + 13 =
  38. 38.46 + 85 =
  39. 39.69 + 69 =
  40. 40.68 + 78 =

Answer key

  1. 150
  2. 53
  3. 51
  4. 115
  5. 57
  6. 143
  7. 157
  8. 121
  9. 60
  10. 69
  11. 51
  12. 144
  13. 123
  14. 72
  15. 54
  16. 95
  17. 88
  18. 168
  19. 68
  20. 114
  21. 87
  22. 134
  23. 70
  24. 127
  25. 148
  26. 166
  27. 79
  28. 130
  29. 115
  30. 71
  31. 108
  32. 92
  33. 108
  34. 103
  35. 112
  36. 57
  37. 71
  38. 131
  39. 138
  40. 146

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