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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 906 · 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. 1.55 + 78 =
  2. 2.84 + 83 =
  3. 3.26 + 45 =
  4. 4.23 + 61 =
  5. 5.26 + 74 =
  6. 6.58 + 88 =
  7. 7.52 + 57 =
  8. 8.29 + 16 =
  9. 9.26 + 52 =
  10. 10.72 + 43 =
  11. 11.65 + 13 =
  12. 12.60 + 55 =
  13. 13.24 + 28 =
  14. 14.43 + 83 =
  15. 15.71 + 75 =
  16. 16.38 + 81 =
  17. 17.65 + 17 =
  18. 18.83 + 81 =
  19. 19.64 + 71 =
  20. 20.57 + 31 =
  21. 21.48 + 78 =
  22. 22.89 + 14 =
  23. 23.47 + 22 =
  24. 24.70 + 48 =
  25. 25.33 + 71 =
  26. 26.69 + 83 =
  27. 27.29 + 64 =
  28. 28.39 + 51 =
  29. 29.59 + 39 =
  30. 30.30 + 48 =
  31. 31.34 + 83 =
  32. 32.47 + 77 =
  33. 33.52 + 37 =
  34. 34.25 + 41 =
  35. 35.34 + 67 =
  36. 36.84 + 21 =
  37. 37.84 + 61 =
  38. 38.22 + 21 =
  39. 39.49 + 44 =
  40. 40.88 + 59 =

Answer key

  1. 133
  2. 167
  3. 71
  4. 84
  5. 100
  6. 146
  7. 109
  8. 45
  9. 78
  10. 115
  11. 78
  12. 115
  13. 52
  14. 126
  15. 146
  16. 119
  17. 82
  18. 164
  19. 135
  20. 88
  21. 126
  22. 103
  23. 69
  24. 118
  25. 104
  26. 152
  27. 93
  28. 90
  29. 98
  30. 78
  31. 117
  32. 124
  33. 89
  34. 66
  35. 101
  36. 105
  37. 145
  38. 43
  39. 93
  40. 147

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