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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 914 · 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. 1.54 + 49 =
  2. 2.71 + 34 =
  3. 3.64 + 33 =
  4. 4.64 + 29 =
  5. 5.64 + 39 =
  6. 6.21 + 15 =
  7. 7.41 + 66 =
  8. 8.56 + 75 =
  9. 9.37 + 51 =
  10. 10.77 + 67 =
  11. 11.30 + 31 =
  12. 12.27 + 35 =
  13. 13.53 + 81 =
  14. 14.31 + 32 =
  15. 15.80 + 21 =
  16. 16.39 + 21 =
  17. 17.80 + 71 =
  18. 18.85 + 21 =
  19. 19.48 + 37 =
  20. 20.56 + 31 =
  21. 21.38 + 52 =
  22. 22.25 + 39 =
  23. 23.21 + 22 =
  24. 24.38 + 29 =
  25. 25.64 + 73 =
  26. 26.65 + 13 =
  27. 27.27 + 79 =
  28. 28.36 + 15 =
  29. 29.62 + 63 =
  30. 30.85 + 56 =
  31. 31.67 + 61 =
  32. 32.62 + 26 =
  33. 33.26 + 26 =
  34. 34.26 + 12 =
  35. 35.61 + 21 =
  36. 36.65 + 74 =
  37. 37.83 + 27 =
  38. 38.66 + 38 =
  39. 39.80 + 64 =
  40. 40.80 + 46 =

Answer key

  1. 103
  2. 105
  3. 97
  4. 93
  5. 103
  6. 36
  7. 107
  8. 131
  9. 88
  10. 144
  11. 61
  12. 62
  13. 134
  14. 63
  15. 101
  16. 60
  17. 151
  18. 106
  19. 85
  20. 87
  21. 90
  22. 64
  23. 43
  24. 67
  25. 137
  26. 78
  27. 106
  28. 51
  29. 125
  30. 141
  31. 128
  32. 88
  33. 52
  34. 38
  35. 82
  36. 139
  37. 110
  38. 104
  39. 144
  40. 126

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