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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 991 · 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 + 13 =
  2. 2.36 + 77 =
  3. 3.46 + 26 =
  4. 4.39 + 22 =
  5. 5.48 + 75 =
  6. 6.69 + 16 =
  7. 7.37 + 31 =
  8. 8.36 + 59 =
  9. 9.61 + 19 =
  10. 10.29 + 48 =
  11. 11.57 + 51 =
  12. 12.33 + 28 =
  13. 13.68 + 85 =
  14. 14.70 + 35 =
  15. 15.60 + 14 =
  16. 16.85 + 75 =
  17. 17.21 + 18 =
  18. 18.29 + 32 =
  19. 19.22 + 48 =
  20. 20.25 + 41 =
  21. 21.82 + 12 =
  22. 22.62 + 24 =
  23. 23.40 + 47 =
  24. 24.35 + 26 =
  25. 25.21 + 29 =
  26. 26.73 + 89 =
  27. 27.70 + 18 =
  28. 28.50 + 44 =
  29. 29.43 + 24 =
  30. 30.26 + 41 =
  31. 31.71 + 79 =
  32. 32.25 + 31 =
  33. 33.76 + 27 =
  34. 34.31 + 66 =
  35. 35.70 + 63 =
  36. 36.57 + 25 =
  37. 37.53 + 27 =
  38. 38.55 + 71 =
  39. 39.33 + 78 =
  40. 40.47 + 85 =

Answer key

  1. 34
  2. 113
  3. 72
  4. 61
  5. 123
  6. 85
  7. 68
  8. 95
  9. 80
  10. 77
  11. 108
  12. 61
  13. 153
  14. 105
  15. 74
  16. 160
  17. 39
  18. 61
  19. 70
  20. 66
  21. 94
  22. 86
  23. 87
  24. 61
  25. 50
  26. 162
  27. 88
  28. 94
  29. 67
  30. 67
  31. 150
  32. 56
  33. 103
  34. 97
  35. 133
  36. 82
  37. 80
  38. 126
  39. 111
  40. 132

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