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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 887 · 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. 1.39 + 46 =
  2. 2.53 + 23 =
  3. 3.23 + 59 =
  4. 4.59 + 87 =
  5. 5.26 + 59 =
  6. 6.48 + 89 =
  7. 7.60 + 29 =
  8. 8.66 + 32 =
  9. 9.53 + 58 =
  10. 10.21 + 88 =
  11. 11.53 + 46 =
  12. 12.39 + 61 =
  13. 13.59 + 54 =
  14. 14.37 + 12 =
  15. 15.61 + 82 =
  16. 16.58 + 61 =
  17. 17.24 + 62 =
  18. 18.26 + 78 =
  19. 19.80 + 85 =
  20. 20.83 + 22 =
  21. 21.38 + 13 =
  22. 22.51 + 58 =
  23. 23.44 + 72 =
  24. 24.79 + 89 =
  25. 25.87 + 88 =
  26. 26.81 + 67 =
  27. 27.43 + 27 =
  28. 28.22 + 26 =
  29. 29.55 + 81 =
  30. 30.75 + 13 =
  31. 31.73 + 32 =
  32. 32.21 + 63 =
  33. 33.58 + 21 =
  34. 34.74 + 64 =
  35. 35.75 + 75 =
  36. 36.36 + 49 =
  37. 37.40 + 25 =
  38. 38.83 + 62 =
  39. 39.31 + 47 =
  40. 40.68 + 62 =

Answer key

  1. 85
  2. 76
  3. 82
  4. 146
  5. 85
  6. 137
  7. 89
  8. 98
  9. 111
  10. 109
  11. 99
  12. 100
  13. 113
  14. 49
  15. 143
  16. 119
  17. 86
  18. 104
  19. 165
  20. 105
  21. 51
  22. 109
  23. 116
  24. 168
  25. 175
  26. 148
  27. 70
  28. 48
  29. 136
  30. 88
  31. 105
  32. 84
  33. 79
  34. 138
  35. 150
  36. 85
  37. 65
  38. 145
  39. 78
  40. 130

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