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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 990 · 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. 1.38 + 32 =
  2. 2.23 + 81 =
  3. 3.62 + 51 =
  4. 4.38 + 51 =
  5. 5.88 + 68 =
  6. 6.31 + 71 =
  7. 7.40 + 81 =
  8. 8.46 + 58 =
  9. 9.26 + 34 =
  10. 10.47 + 28 =
  11. 11.61 + 62 =
  12. 12.39 + 63 =
  13. 13.63 + 17 =
  14. 14.67 + 79 =
  15. 15.54 + 83 =
  16. 16.40 + 85 =
  17. 17.76 + 51 =
  18. 18.38 + 71 =
  19. 19.81 + 16 =
  20. 20.59 + 31 =
  21. 21.53 + 45 =
  22. 22.74 + 44 =
  23. 23.40 + 58 =
  24. 24.24 + 17 =
  25. 25.54 + 76 =
  26. 26.39 + 75 =
  27. 27.52 + 36 =
  28. 28.60 + 86 =
  29. 29.57 + 51 =
  30. 30.81 + 15 =
  31. 31.89 + 13 =
  32. 32.49 + 16 =
  33. 33.25 + 68 =
  34. 34.77 + 13 =
  35. 35.66 + 82 =
  36. 36.56 + 86 =
  37. 37.85 + 51 =
  38. 38.26 + 69 =
  39. 39.51 + 74 =
  40. 40.81 + 31 =

Answer key

  1. 70
  2. 104
  3. 113
  4. 89
  5. 156
  6. 102
  7. 121
  8. 104
  9. 60
  10. 75
  11. 123
  12. 102
  13. 80
  14. 146
  15. 137
  16. 125
  17. 127
  18. 109
  19. 97
  20. 90
  21. 98
  22. 118
  23. 98
  24. 41
  25. 130
  26. 114
  27. 88
  28. 146
  29. 108
  30. 96
  31. 102
  32. 65
  33. 93
  34. 90
  35. 148
  36. 142
  37. 136
  38. 95
  39. 125
  40. 112

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