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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 859 · 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. 1.75 + 69 =
  2. 2.21 + 19 =
  3. 3.30 + 49 =
  4. 4.77 + 23 =
  5. 5.26 + 31 =
  6. 6.53 + 21 =
  7. 7.26 + 72 =
  8. 8.78 + 41 =
  9. 9.83 + 51 =
  10. 10.40 + 48 =
  11. 11.60 + 12 =
  12. 12.67 + 29 =
  13. 13.32 + 35 =
  14. 14.44 + 42 =
  15. 15.39 + 72 =
  16. 16.89 + 87 =
  17. 17.52 + 78 =
  18. 18.89 + 36 =
  19. 19.78 + 21 =
  20. 20.56 + 12 =
  21. 21.50 + 58 =
  22. 22.47 + 83 =
  23. 23.31 + 63 =
  24. 24.87 + 36 =
  25. 25.28 + 33 =
  26. 26.45 + 61 =
  27. 27.42 + 54 =
  28. 28.66 + 43 =
  29. 29.32 + 14 =
  30. 30.43 + 51 =
  31. 31.73 + 14 =
  32. 32.30 + 47 =
  33. 33.30 + 71 =
  34. 34.40 + 38 =
  35. 35.60 + 42 =
  36. 36.49 + 81 =
  37. 37.60 + 58 =
  38. 38.74 + 51 =
  39. 39.41 + 47 =
  40. 40.35 + 18 =

Answer key

  1. 144
  2. 40
  3. 79
  4. 100
  5. 57
  6. 74
  7. 98
  8. 119
  9. 134
  10. 88
  11. 72
  12. 96
  13. 67
  14. 86
  15. 111
  16. 176
  17. 130
  18. 125
  19. 99
  20. 68
  21. 108
  22. 130
  23. 94
  24. 123
  25. 61
  26. 106
  27. 96
  28. 109
  29. 46
  30. 94
  31. 87
  32. 77
  33. 101
  34. 78
  35. 102
  36. 130
  37. 118
  38. 125
  39. 88
  40. 53

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