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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 860 · 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. 1.74 + 55 =
  2. 2.86 + 63 =
  3. 3.21 + 76 =
  4. 4.74 + 41 =
  5. 5.52 + 49 =
  6. 6.38 + 41 =
  7. 7.75 + 21 =
  8. 8.54 + 36 =
  9. 9.62 + 62 =
  10. 10.79 + 35 =
  11. 11.69 + 83 =
  12. 12.74 + 24 =
  13. 13.85 + 84 =
  14. 14.81 + 21 =
  15. 15.52 + 75 =
  16. 16.59 + 87 =
  17. 17.54 + 55 =
  18. 18.47 + 57 =
  19. 19.89 + 18 =
  20. 20.63 + 18 =
  21. 21.83 + 42 =
  22. 22.35 + 41 =
  23. 23.42 + 67 =
  24. 24.77 + 79 =
  25. 25.22 + 65 =
  26. 26.66 + 62 =
  27. 27.82 + 33 =
  28. 28.49 + 86 =
  29. 29.84 + 65 =
  30. 30.30 + 38 =
  31. 31.29 + 87 =
  32. 32.72 + 49 =
  33. 33.31 + 13 =
  34. 34.89 + 32 =
  35. 35.29 + 69 =
  36. 36.47 + 74 =
  37. 37.87 + 49 =
  38. 38.54 + 19 =
  39. 39.30 + 83 =
  40. 40.30 + 69 =

Answer key

  1. 129
  2. 149
  3. 97
  4. 115
  5. 101
  6. 79
  7. 96
  8. 90
  9. 124
  10. 114
  11. 152
  12. 98
  13. 169
  14. 102
  15. 127
  16. 146
  17. 109
  18. 104
  19. 107
  20. 81
  21. 125
  22. 76
  23. 109
  24. 156
  25. 87
  26. 128
  27. 115
  28. 135
  29. 149
  30. 68
  31. 116
  32. 121
  33. 44
  34. 121
  35. 98
  36. 121
  37. 136
  38. 73
  39. 113
  40. 99

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