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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 889 · 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. 1.57 + 69 =
  2. 2.75 + 38 =
  3. 3.23 + 22 =
  4. 4.44 + 52 =
  5. 5.61 + 53 =
  6. 6.21 + 53 =
  7. 7.31 + 45 =
  8. 8.50 + 83 =
  9. 9.26 + 84 =
  10. 10.25 + 26 =
  11. 11.57 + 66 =
  12. 12.73 + 89 =
  13. 13.28 + 28 =
  14. 14.59 + 25 =
  15. 15.65 + 86 =
  16. 16.34 + 21 =
  17. 17.78 + 32 =
  18. 18.45 + 58 =
  19. 19.61 + 77 =
  20. 20.45 + 61 =
  21. 21.33 + 54 =
  22. 22.88 + 68 =
  23. 23.38 + 45 =
  24. 24.82 + 56 =
  25. 25.86 + 16 =
  26. 26.66 + 51 =
  27. 27.59 + 56 =
  28. 28.26 + 64 =
  29. 29.52 + 12 =
  30. 30.34 + 18 =
  31. 31.41 + 12 =
  32. 32.72 + 35 =
  33. 33.65 + 67 =
  34. 34.77 + 21 =
  35. 35.59 + 41 =
  36. 36.47 + 43 =
  37. 37.25 + 49 =
  38. 38.26 + 51 =
  39. 39.35 + 75 =
  40. 40.68 + 31 =

Answer key

  1. 126
  2. 113
  3. 45
  4. 96
  5. 114
  6. 74
  7. 76
  8. 133
  9. 110
  10. 51
  11. 123
  12. 162
  13. 56
  14. 84
  15. 151
  16. 55
  17. 110
  18. 103
  19. 138
  20. 106
  21. 87
  22. 156
  23. 83
  24. 138
  25. 102
  26. 117
  27. 115
  28. 90
  29. 64
  30. 52
  31. 53
  32. 107
  33. 132
  34. 98
  35. 100
  36. 90
  37. 74
  38. 77
  39. 110
  40. 99

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