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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 874 · 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. 1.69 + 81 =
  2. 2.50 + 34 =
  3. 3.38 + 81 =
  4. 4.48 + 87 =
  5. 5.48 + 69 =
  6. 6.80 + 25 =
  7. 7.51 + 47 =
  8. 8.54 + 77 =
  9. 9.79 + 21 =
  10. 10.72 + 36 =
  11. 11.30 + 14 =
  12. 12.62 + 28 =
  13. 13.47 + 53 =
  14. 14.53 + 27 =
  15. 15.57 + 68 =
  16. 16.82 + 28 =
  17. 17.65 + 84 =
  18. 18.37 + 82 =
  19. 19.83 + 24 =
  20. 20.77 + 76 =
  21. 21.22 + 88 =
  22. 22.88 + 71 =
  23. 23.44 + 44 =
  24. 24.76 + 88 =
  25. 25.62 + 32 =
  26. 26.32 + 31 =
  27. 27.86 + 74 =
  28. 28.24 + 53 =
  29. 29.76 + 33 =
  30. 30.71 + 71 =
  31. 31.60 + 43 =
  32. 32.28 + 27 =
  33. 33.56 + 84 =
  34. 34.50 + 49 =
  35. 35.65 + 52 =
  36. 36.66 + 78 =
  37. 37.62 + 31 =
  38. 38.37 + 73 =
  39. 39.44 + 65 =
  40. 40.66 + 82 =

Answer key

  1. 150
  2. 84
  3. 119
  4. 135
  5. 117
  6. 105
  7. 98
  8. 131
  9. 100
  10. 108
  11. 44
  12. 90
  13. 100
  14. 80
  15. 125
  16. 110
  17. 149
  18. 119
  19. 107
  20. 153
  21. 110
  22. 159
  23. 88
  24. 164
  25. 94
  26. 63
  27. 160
  28. 77
  29. 109
  30. 142
  31. 103
  32. 55
  33. 140
  34. 99
  35. 117
  36. 144
  37. 93
  38. 110
  39. 109
  40. 148

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