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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 908 · 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. 1.52 + 71 =
  2. 2.63 + 84 =
  3. 3.70 + 48 =
  4. 4.82 + 83 =
  5. 5.51 + 79 =
  6. 6.58 + 71 =
  7. 7.40 + 25 =
  8. 8.22 + 27 =
  9. 9.72 + 81 =
  10. 10.84 + 13 =
  11. 11.78 + 45 =
  12. 12.77 + 78 =
  13. 13.34 + 83 =
  14. 14.60 + 41 =
  15. 15.42 + 31 =
  16. 16.87 + 27 =
  17. 17.82 + 16 =
  18. 18.80 + 67 =
  19. 19.72 + 12 =
  20. 20.41 + 77 =
  21. 21.33 + 64 =
  22. 22.27 + 89 =
  23. 23.33 + 57 =
  24. 24.57 + 57 =
  25. 25.35 + 34 =
  26. 26.73 + 17 =
  27. 27.66 + 36 =
  28. 28.50 + 63 =
  29. 29.47 + 17 =
  30. 30.25 + 47 =
  31. 31.48 + 47 =
  32. 32.30 + 27 =
  33. 33.61 + 56 =
  34. 34.52 + 34 =
  35. 35.52 + 42 =
  36. 36.80 + 28 =
  37. 37.38 + 16 =
  38. 38.44 + 75 =
  39. 39.28 + 24 =
  40. 40.62 + 74 =

Answer key

  1. 123
  2. 147
  3. 118
  4. 165
  5. 130
  6. 129
  7. 65
  8. 49
  9. 153
  10. 97
  11. 123
  12. 155
  13. 117
  14. 101
  15. 73
  16. 114
  17. 98
  18. 147
  19. 84
  20. 118
  21. 97
  22. 116
  23. 90
  24. 114
  25. 69
  26. 90
  27. 102
  28. 113
  29. 64
  30. 72
  31. 95
  32. 57
  33. 117
  34. 86
  35. 94
  36. 108
  37. 54
  38. 119
  39. 52
  40. 136

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