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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 979 · 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. 1.88 + 83 =
  2. 2.37 + 75 =
  3. 3.39 + 35 =
  4. 4.29 + 32 =
  5. 5.36 + 41 =
  6. 6.31 + 65 =
  7. 7.89 + 59 =
  8. 8.85 + 52 =
  9. 9.76 + 25 =
  10. 10.38 + 82 =
  11. 11.89 + 45 =
  12. 12.47 + 51 =
  13. 13.40 + 34 =
  14. 14.87 + 27 =
  15. 15.84 + 86 =
  16. 16.73 + 58 =
  17. 17.27 + 64 =
  18. 18.77 + 78 =
  19. 19.47 + 26 =
  20. 20.27 + 62 =
  21. 21.67 + 32 =
  22. 22.36 + 82 =
  23. 23.51 + 27 =
  24. 24.42 + 35 =
  25. 25.71 + 25 =
  26. 26.24 + 37 =
  27. 27.63 + 81 =
  28. 28.35 + 41 =
  29. 29.82 + 49 =
  30. 30.70 + 34 =
  31. 31.76 + 53 =
  32. 32.49 + 44 =
  33. 33.45 + 71 =
  34. 34.87 + 29 =
  35. 35.41 + 68 =
  36. 36.71 + 59 =
  37. 37.28 + 21 =
  38. 38.25 + 29 =
  39. 39.59 + 22 =
  40. 40.27 + 31 =

Answer key

  1. 171
  2. 112
  3. 74
  4. 61
  5. 77
  6. 96
  7. 148
  8. 137
  9. 101
  10. 120
  11. 134
  12. 98
  13. 74
  14. 114
  15. 170
  16. 131
  17. 91
  18. 155
  19. 73
  20. 89
  21. 99
  22. 118
  23. 78
  24. 77
  25. 96
  26. 61
  27. 144
  28. 76
  29. 131
  30. 104
  31. 129
  32. 93
  33. 116
  34. 116
  35. 109
  36. 130
  37. 49
  38. 54
  39. 81
  40. 58

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