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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 876 · 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. 1.86 + 25 =
  2. 2.37 + 54 =
  3. 3.87 + 22 =
  4. 4.36 + 12 =
  5. 5.41 + 26 =
  6. 6.78 + 24 =
  7. 7.22 + 26 =
  8. 8.48 + 67 =
  9. 9.76 + 59 =
  10. 10.47 + 88 =
  11. 11.42 + 35 =
  12. 12.43 + 84 =
  13. 13.50 + 28 =
  14. 14.82 + 79 =
  15. 15.65 + 24 =
  16. 16.47 + 14 =
  17. 17.34 + 44 =
  18. 18.51 + 27 =
  19. 19.51 + 69 =
  20. 20.59 + 84 =
  21. 21.50 + 76 =
  22. 22.86 + 86 =
  23. 23.89 + 81 =
  24. 24.37 + 81 =
  25. 25.83 + 54 =
  26. 26.45 + 85 =
  27. 27.26 + 66 =
  28. 28.30 + 59 =
  29. 29.30 + 27 =
  30. 30.76 + 13 =
  31. 31.23 + 71 =
  32. 32.22 + 52 =
  33. 33.76 + 37 =
  34. 34.51 + 53 =
  35. 35.38 + 32 =
  36. 36.72 + 81 =
  37. 37.55 + 34 =
  38. 38.83 + 79 =
  39. 39.62 + 51 =
  40. 40.38 + 34 =

Answer key

  1. 111
  2. 91
  3. 109
  4. 48
  5. 67
  6. 102
  7. 48
  8. 115
  9. 135
  10. 135
  11. 77
  12. 127
  13. 78
  14. 161
  15. 89
  16. 61
  17. 78
  18. 78
  19. 120
  20. 143
  21. 126
  22. 172
  23. 170
  24. 118
  25. 137
  26. 130
  27. 92
  28. 89
  29. 57
  30. 89
  31. 94
  32. 74
  33. 113
  34. 104
  35. 70
  36. 153
  37. 89
  38. 162
  39. 113
  40. 72

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