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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 855 · 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. 1.34 + 68 =
  2. 2.66 + 79 =
  3. 3.21 + 14 =
  4. 4.59 + 38 =
  5. 5.53 + 31 =
  6. 6.40 + 26 =
  7. 7.68 + 88 =
  8. 8.69 + 26 =
  9. 9.39 + 61 =
  10. 10.64 + 27 =
  11. 11.56 + 27 =
  12. 12.26 + 83 =
  13. 13.87 + 15 =
  14. 14.57 + 59 =
  15. 15.52 + 62 =
  16. 16.60 + 51 =
  17. 17.54 + 21 =
  18. 18.69 + 88 =
  19. 19.21 + 33 =
  20. 20.40 + 49 =
  21. 21.35 + 53 =
  22. 22.68 + 43 =
  23. 23.46 + 27 =
  24. 24.45 + 68 =
  25. 25.37 + 44 =
  26. 26.31 + 79 =
  27. 27.84 + 68 =
  28. 28.43 + 74 =
  29. 29.73 + 23 =
  30. 30.21 + 45 =
  31. 31.22 + 51 =
  32. 32.77 + 63 =
  33. 33.39 + 81 =
  34. 34.35 + 21 =
  35. 35.88 + 58 =
  36. 36.75 + 89 =
  37. 37.52 + 58 =
  38. 38.27 + 34 =
  39. 39.29 + 26 =
  40. 40.22 + 87 =

Answer key

  1. 102
  2. 145
  3. 35
  4. 97
  5. 84
  6. 66
  7. 156
  8. 95
  9. 100
  10. 91
  11. 83
  12. 109
  13. 102
  14. 116
  15. 114
  16. 111
  17. 75
  18. 157
  19. 54
  20. 89
  21. 88
  22. 111
  23. 73
  24. 113
  25. 81
  26. 110
  27. 152
  28. 117
  29. 96
  30. 66
  31. 73
  32. 140
  33. 120
  34. 56
  35. 146
  36. 164
  37. 110
  38. 61
  39. 55
  40. 109

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