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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 872 · 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. 1.52 + 56 =
  2. 2.70 + 24 =
  3. 3.31 + 47 =
  4. 4.55 + 73 =
  5. 5.54 + 36 =
  6. 6.32 + 48 =
  7. 7.89 + 31 =
  8. 8.68 + 49 =
  9. 9.67 + 33 =
  10. 10.43 + 14 =
  11. 11.68 + 55 =
  12. 12.69 + 33 =
  13. 13.76 + 53 =
  14. 14.30 + 74 =
  15. 15.29 + 44 =
  16. 16.84 + 74 =
  17. 17.41 + 21 =
  18. 18.40 + 69 =
  19. 19.77 + 48 =
  20. 20.74 + 66 =
  21. 21.88 + 74 =
  22. 22.84 + 19 =
  23. 23.68 + 47 =
  24. 24.22 + 33 =
  25. 25.31 + 78 =
  26. 26.51 + 33 =
  27. 27.40 + 36 =
  28. 28.31 + 85 =
  29. 29.72 + 45 =
  30. 30.61 + 55 =
  31. 31.32 + 52 =
  32. 32.65 + 46 =
  33. 33.57 + 44 =
  34. 34.46 + 69 =
  35. 35.31 + 16 =
  36. 36.32 + 22 =
  37. 37.64 + 85 =
  38. 38.56 + 29 =
  39. 39.35 + 41 =
  40. 40.46 + 37 =

Answer key

  1. 108
  2. 94
  3. 78
  4. 128
  5. 90
  6. 80
  7. 120
  8. 117
  9. 100
  10. 57
  11. 123
  12. 102
  13. 129
  14. 104
  15. 73
  16. 158
  17. 62
  18. 109
  19. 125
  20. 140
  21. 162
  22. 103
  23. 115
  24. 55
  25. 109
  26. 84
  27. 76
  28. 116
  29. 117
  30. 116
  31. 84
  32. 111
  33. 101
  34. 115
  35. 47
  36. 54
  37. 149
  38. 85
  39. 76
  40. 83

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