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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 857 · 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. 1.33 + 12 =
  2. 2.63 + 25 =
  3. 3.27 + 64 =
  4. 4.23 + 29 =
  5. 5.75 + 85 =
  6. 6.26 + 22 =
  7. 7.43 + 24 =
  8. 8.30 + 74 =
  9. 9.59 + 27 =
  10. 10.58 + 81 =
  11. 11.60 + 49 =
  12. 12.22 + 85 =
  13. 13.47 + 14 =
  14. 14.31 + 26 =
  15. 15.28 + 41 =
  16. 16.63 + 67 =
  17. 17.28 + 35 =
  18. 18.25 + 89 =
  19. 19.30 + 19 =
  20. 20.32 + 64 =
  21. 21.38 + 67 =
  22. 22.22 + 61 =
  23. 23.51 + 23 =
  24. 24.59 + 29 =
  25. 25.82 + 28 =
  26. 26.79 + 72 =
  27. 27.87 + 28 =
  28. 28.34 + 15 =
  29. 29.27 + 45 =
  30. 30.36 + 87 =
  31. 31.75 + 53 =
  32. 32.40 + 31 =
  33. 33.72 + 41 =
  34. 34.22 + 41 =
  35. 35.59 + 79 =
  36. 36.66 + 17 =
  37. 37.37 + 23 =
  38. 38.80 + 84 =
  39. 39.60 + 41 =
  40. 40.27 + 83 =

Answer key

  1. 45
  2. 88
  3. 91
  4. 52
  5. 160
  6. 48
  7. 67
  8. 104
  9. 86
  10. 139
  11. 109
  12. 107
  13. 61
  14. 57
  15. 69
  16. 130
  17. 63
  18. 114
  19. 49
  20. 96
  21. 105
  22. 83
  23. 74
  24. 88
  25. 110
  26. 151
  27. 115
  28. 49
  29. 72
  30. 123
  31. 128
  32. 71
  33. 113
  34. 63
  35. 138
  36. 83
  37. 60
  38. 164
  39. 101
  40. 110

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