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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 989 · 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. 1.83 + 79 =
  2. 2.22 + 47 =
  3. 3.38 + 14 =
  4. 4.57 + 23 =
  5. 5.33 + 22 =
  6. 6.79 + 54 =
  7. 7.89 + 17 =
  8. 8.71 + 15 =
  9. 9.41 + 87 =
  10. 10.41 + 26 =
  11. 11.59 + 45 =
  12. 12.42 + 45 =
  13. 13.70 + 41 =
  14. 14.52 + 26 =
  15. 15.38 + 82 =
  16. 16.42 + 71 =
  17. 17.26 + 29 =
  18. 18.58 + 57 =
  19. 19.32 + 28 =
  20. 20.44 + 28 =
  21. 21.71 + 64 =
  22. 22.42 + 16 =
  23. 23.75 + 28 =
  24. 24.53 + 31 =
  25. 25.38 + 66 =
  26. 26.44 + 84 =
  27. 27.32 + 87 =
  28. 28.59 + 89 =
  29. 29.49 + 88 =
  30. 30.79 + 79 =
  31. 31.40 + 75 =
  32. 32.36 + 64 =
  33. 33.30 + 69 =
  34. 34.83 + 13 =
  35. 35.24 + 63 =
  36. 36.49 + 68 =
  37. 37.80 + 32 =
  38. 38.80 + 22 =
  39. 39.66 + 51 =
  40. 40.72 + 58 =

Answer key

  1. 162
  2. 69
  3. 52
  4. 80
  5. 55
  6. 133
  7. 106
  8. 86
  9. 128
  10. 67
  11. 104
  12. 87
  13. 111
  14. 78
  15. 120
  16. 113
  17. 55
  18. 115
  19. 60
  20. 72
  21. 135
  22. 58
  23. 103
  24. 84
  25. 104
  26. 128
  27. 119
  28. 148
  29. 137
  30. 158
  31. 115
  32. 100
  33. 99
  34. 96
  35. 87
  36. 117
  37. 112
  38. 102
  39. 117
  40. 130

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