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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 902 · 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. 1.56 + 59 =
  2. 2.49 + 39 =
  3. 3.21 + 33 =
  4. 4.31 + 17 =
  5. 5.52 + 29 =
  6. 6.36 + 41 =
  7. 7.38 + 22 =
  8. 8.41 + 43 =
  9. 9.29 + 12 =
  10. 10.45 + 77 =
  11. 11.64 + 69 =
  12. 12.23 + 59 =
  13. 13.76 + 89 =
  14. 14.79 + 77 =
  15. 15.33 + 61 =
  16. 16.72 + 44 =
  17. 17.70 + 72 =
  18. 18.31 + 56 =
  19. 19.40 + 88 =
  20. 20.73 + 54 =
  21. 21.39 + 81 =
  22. 22.76 + 86 =
  23. 23.89 + 43 =
  24. 24.22 + 85 =
  25. 25.67 + 86 =
  26. 26.40 + 43 =
  27. 27.65 + 71 =
  28. 28.28 + 21 =
  29. 29.36 + 14 =
  30. 30.83 + 61 =
  31. 31.36 + 28 =
  32. 32.30 + 39 =
  33. 33.46 + 51 =
  34. 34.67 + 76 =
  35. 35.70 + 89 =
  36. 36.79 + 45 =
  37. 37.40 + 68 =
  38. 38.41 + 47 =
  39. 39.48 + 31 =
  40. 40.51 + 24 =

Answer key

  1. 115
  2. 88
  3. 54
  4. 48
  5. 81
  6. 77
  7. 60
  8. 84
  9. 41
  10. 122
  11. 133
  12. 82
  13. 165
  14. 156
  15. 94
  16. 116
  17. 142
  18. 87
  19. 128
  20. 127
  21. 120
  22. 162
  23. 132
  24. 107
  25. 153
  26. 83
  27. 136
  28. 49
  29. 50
  30. 144
  31. 64
  32. 69
  33. 97
  34. 143
  35. 159
  36. 124
  37. 108
  38. 88
  39. 79
  40. 75

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