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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 957 · 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. 1.34 + 71 =
  2. 2.24 + 21 =
  3. 3.60 + 58 =
  4. 4.45 + 29 =
  5. 5.23 + 12 =
  6. 6.32 + 65 =
  7. 7.84 + 71 =
  8. 8.50 + 52 =
  9. 9.47 + 15 =
  10. 10.32 + 43 =
  11. 11.86 + 75 =
  12. 12.29 + 43 =
  13. 13.75 + 47 =
  14. 14.87 + 66 =
  15. 15.36 + 19 =
  16. 16.59 + 17 =
  17. 17.40 + 42 =
  18. 18.29 + 48 =
  19. 19.33 + 51 =
  20. 20.39 + 51 =
  21. 21.40 + 89 =
  22. 22.56 + 42 =
  23. 23.63 + 14 =
  24. 24.49 + 51 =
  25. 25.28 + 21 =
  26. 26.40 + 65 =
  27. 27.85 + 14 =
  28. 28.81 + 49 =
  29. 29.78 + 66 =
  30. 30.39 + 31 =
  31. 31.66 + 57 =
  32. 32.80 + 86 =
  33. 33.53 + 18 =
  34. 34.43 + 64 =
  35. 35.33 + 31 =
  36. 36.82 + 38 =
  37. 37.59 + 79 =
  38. 38.64 + 38 =
  39. 39.33 + 19 =
  40. 40.70 + 57 =

Answer key

  1. 105
  2. 45
  3. 118
  4. 74
  5. 35
  6. 97
  7. 155
  8. 102
  9. 62
  10. 75
  11. 161
  12. 72
  13. 122
  14. 153
  15. 55
  16. 76
  17. 82
  18. 77
  19. 84
  20. 90
  21. 129
  22. 98
  23. 77
  24. 100
  25. 49
  26. 105
  27. 99
  28. 130
  29. 144
  30. 70
  31. 123
  32. 166
  33. 71
  34. 107
  35. 64
  36. 120
  37. 138
  38. 102
  39. 52
  40. 127

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