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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 960 · 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. 1.35 + 53 =
  2. 2.33 + 36 =
  3. 3.65 + 68 =
  4. 4.86 + 48 =
  5. 5.48 + 22 =
  6. 6.63 + 24 =
  7. 7.74 + 45 =
  8. 8.39 + 85 =
  9. 9.36 + 85 =
  10. 10.89 + 17 =
  11. 11.25 + 32 =
  12. 12.65 + 13 =
  13. 13.23 + 52 =
  14. 14.66 + 65 =
  15. 15.27 + 84 =
  16. 16.86 + 21 =
  17. 17.22 + 13 =
  18. 18.61 + 84 =
  19. 19.52 + 42 =
  20. 20.62 + 88 =
  21. 21.85 + 48 =
  22. 22.71 + 52 =
  23. 23.72 + 85 =
  24. 24.27 + 15 =
  25. 25.36 + 63 =
  26. 26.44 + 64 =
  27. 27.63 + 86 =
  28. 28.34 + 35 =
  29. 29.31 + 41 =
  30. 30.52 + 44 =
  31. 31.23 + 41 =
  32. 32.84 + 62 =
  33. 33.43 + 37 =
  34. 34.89 + 18 =
  35. 35.56 + 27 =
  36. 36.52 + 78 =
  37. 37.27 + 71 =
  38. 38.84 + 29 =
  39. 39.40 + 81 =
  40. 40.27 + 87 =

Answer key

  1. 88
  2. 69
  3. 133
  4. 134
  5. 70
  6. 87
  7. 119
  8. 124
  9. 121
  10. 106
  11. 57
  12. 78
  13. 75
  14. 131
  15. 111
  16. 107
  17. 35
  18. 145
  19. 94
  20. 150
  21. 133
  22. 123
  23. 157
  24. 42
  25. 99
  26. 108
  27. 149
  28. 69
  29. 72
  30. 96
  31. 64
  32. 146
  33. 80
  34. 107
  35. 83
  36. 130
  37. 98
  38. 113
  39. 121
  40. 114

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