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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 862 · 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. 1.23 + 36 =
  2. 2.78 + 22 =
  3. 3.82 + 41 =
  4. 4.49 + 84 =
  5. 5.60 + 25 =
  6. 6.34 + 13 =
  7. 7.64 + 87 =
  8. 8.77 + 81 =
  9. 9.50 + 87 =
  10. 10.47 + 37 =
  11. 11.57 + 41 =
  12. 12.31 + 64 =
  13. 13.72 + 51 =
  14. 14.58 + 74 =
  15. 15.61 + 58 =
  16. 16.69 + 18 =
  17. 17.47 + 32 =
  18. 18.67 + 31 =
  19. 19.79 + 66 =
  20. 20.82 + 16 =
  21. 21.82 + 26 =
  22. 22.45 + 21 =
  23. 23.74 + 75 =
  24. 24.42 + 37 =
  25. 25.37 + 16 =
  26. 26.28 + 56 =
  27. 27.89 + 71 =
  28. 28.49 + 63 =
  29. 29.73 + 22 =
  30. 30.74 + 77 =
  31. 31.29 + 58 =
  32. 32.64 + 62 =
  33. 33.55 + 36 =
  34. 34.63 + 53 =
  35. 35.70 + 13 =
  36. 36.77 + 36 =
  37. 37.36 + 77 =
  38. 38.75 + 53 =
  39. 39.49 + 21 =
  40. 40.65 + 61 =

Answer key

  1. 59
  2. 100
  3. 123
  4. 133
  5. 85
  6. 47
  7. 151
  8. 158
  9. 137
  10. 84
  11. 98
  12. 95
  13. 123
  14. 132
  15. 119
  16. 87
  17. 79
  18. 98
  19. 145
  20. 98
  21. 108
  22. 66
  23. 149
  24. 79
  25. 53
  26. 84
  27. 160
  28. 112
  29. 95
  30. 151
  31. 87
  32. 126
  33. 91
  34. 116
  35. 83
  36. 113
  37. 113
  38. 128
  39. 70
  40. 126

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