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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 909 · 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. 1.42 + 61 =
  2. 2.59 + 34 =
  3. 3.68 + 31 =
  4. 4.71 + 81 =
  5. 5.78 + 36 =
  6. 6.80 + 15 =
  7. 7.51 + 74 =
  8. 8.62 + 66 =
  9. 9.60 + 14 =
  10. 10.67 + 18 =
  11. 11.72 + 41 =
  12. 12.34 + 34 =
  13. 13.67 + 44 =
  14. 14.26 + 43 =
  15. 15.27 + 67 =
  16. 16.70 + 34 =
  17. 17.49 + 53 =
  18. 18.37 + 87 =
  19. 19.36 + 66 =
  20. 20.59 + 19 =
  21. 21.87 + 22 =
  22. 22.52 + 27 =
  23. 23.58 + 75 =
  24. 24.55 + 68 =
  25. 25.65 + 21 =
  26. 26.21 + 85 =
  27. 27.83 + 53 =
  28. 28.54 + 42 =
  29. 29.57 + 59 =
  30. 30.55 + 31 =
  31. 31.38 + 54 =
  32. 32.62 + 54 =
  33. 33.39 + 14 =
  34. 34.52 + 61 =
  35. 35.86 + 61 =
  36. 36.39 + 56 =
  37. 37.33 + 84 =
  38. 38.87 + 17 =
  39. 39.21 + 47 =
  40. 40.68 + 42 =

Answer key

  1. 103
  2. 93
  3. 99
  4. 152
  5. 114
  6. 95
  7. 125
  8. 128
  9. 74
  10. 85
  11. 113
  12. 68
  13. 111
  14. 69
  15. 94
  16. 104
  17. 102
  18. 124
  19. 102
  20. 78
  21. 109
  22. 79
  23. 133
  24. 123
  25. 86
  26. 106
  27. 136
  28. 96
  29. 116
  30. 86
  31. 92
  32. 116
  33. 53
  34. 113
  35. 147
  36. 95
  37. 117
  38. 104
  39. 68
  40. 110

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