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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 904 · 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. 1.54 + 22 =
  2. 2.73 + 49 =
  3. 3.37 + 54 =
  4. 4.56 + 72 =
  5. 5.68 + 24 =
  6. 6.54 + 28 =
  7. 7.78 + 78 =
  8. 8.24 + 34 =
  9. 9.47 + 15 =
  10. 10.86 + 15 =
  11. 11.31 + 51 =
  12. 12.40 + 55 =
  13. 13.34 + 47 =
  14. 14.57 + 56 =
  15. 15.51 + 31 =
  16. 16.83 + 42 =
  17. 17.23 + 17 =
  18. 18.85 + 74 =
  19. 19.35 + 12 =
  20. 20.57 + 33 =
  21. 21.30 + 14 =
  22. 22.59 + 82 =
  23. 23.38 + 38 =
  24. 24.59 + 54 =
  25. 25.70 + 31 =
  26. 26.45 + 15 =
  27. 27.32 + 13 =
  28. 28.71 + 71 =
  29. 29.30 + 88 =
  30. 30.37 + 77 =
  31. 31.45 + 31 =
  32. 32.87 + 73 =
  33. 33.50 + 42 =
  34. 34.82 + 71 =
  35. 35.67 + 71 =
  36. 36.73 + 41 =
  37. 37.45 + 81 =
  38. 38.46 + 15 =
  39. 39.61 + 53 =
  40. 40.39 + 78 =

Answer key

  1. 76
  2. 122
  3. 91
  4. 128
  5. 92
  6. 82
  7. 156
  8. 58
  9. 62
  10. 101
  11. 82
  12. 95
  13. 81
  14. 113
  15. 82
  16. 125
  17. 40
  18. 159
  19. 47
  20. 90
  21. 44
  22. 141
  23. 76
  24. 113
  25. 101
  26. 60
  27. 45
  28. 142
  29. 118
  30. 114
  31. 76
  32. 160
  33. 92
  34. 153
  35. 138
  36. 114
  37. 126
  38. 61
  39. 114
  40. 117

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