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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 986 · 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. 1.21 + 65 =
  2. 2.82 + 25 =
  3. 3.32 + 39 =
  4. 4.77 + 34 =
  5. 5.56 + 31 =
  6. 6.40 + 49 =
  7. 7.76 + 27 =
  8. 8.81 + 26 =
  9. 9.50 + 78 =
  10. 10.76 + 13 =
  11. 11.81 + 66 =
  12. 12.21 + 51 =
  13. 13.39 + 76 =
  14. 14.35 + 66 =
  15. 15.34 + 17 =
  16. 16.41 + 45 =
  17. 17.77 + 41 =
  18. 18.21 + 46 =
  19. 19.24 + 18 =
  20. 20.52 + 68 =
  21. 21.38 + 67 =
  22. 22.30 + 82 =
  23. 23.47 + 86 =
  24. 24.71 + 15 =
  25. 25.54 + 66 =
  26. 26.22 + 65 =
  27. 27.82 + 69 =
  28. 28.89 + 79 =
  29. 29.27 + 61 =
  30. 30.68 + 73 =
  31. 31.44 + 36 =
  32. 32.21 + 26 =
  33. 33.62 + 74 =
  34. 34.65 + 47 =
  35. 35.65 + 27 =
  36. 36.67 + 15 =
  37. 37.31 + 65 =
  38. 38.42 + 79 =
  39. 39.59 + 34 =
  40. 40.37 + 54 =

Answer key

  1. 86
  2. 107
  3. 71
  4. 111
  5. 87
  6. 89
  7. 103
  8. 107
  9. 128
  10. 89
  11. 147
  12. 72
  13. 115
  14. 101
  15. 51
  16. 86
  17. 118
  18. 67
  19. 42
  20. 120
  21. 105
  22. 112
  23. 133
  24. 86
  25. 120
  26. 87
  27. 151
  28. 168
  29. 88
  30. 141
  31. 80
  32. 47
  33. 136
  34. 112
  35. 92
  36. 82
  37. 96
  38. 121
  39. 93
  40. 91

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