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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 869 · 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. 1.71 + 63 =
  2. 2.38 + 47 =
  3. 3.30 + 65 =
  4. 4.82 + 14 =
  5. 5.22 + 13 =
  6. 6.62 + 31 =
  7. 7.37 + 34 =
  8. 8.32 + 83 =
  9. 9.43 + 58 =
  10. 10.43 + 13 =
  11. 11.89 + 12 =
  12. 12.23 + 32 =
  13. 13.83 + 37 =
  14. 14.51 + 71 =
  15. 15.60 + 72 =
  16. 16.45 + 81 =
  17. 17.31 + 51 =
  18. 18.56 + 12 =
  19. 19.32 + 73 =
  20. 20.31 + 88 =
  21. 21.30 + 68 =
  22. 22.43 + 22 =
  23. 23.49 + 52 =
  24. 24.87 + 32 =
  25. 25.26 + 64 =
  26. 26.26 + 84 =
  27. 27.34 + 14 =
  28. 28.74 + 35 =
  29. 29.74 + 57 =
  30. 30.37 + 77 =
  31. 31.23 + 47 =
  32. 32.51 + 58 =
  33. 33.31 + 44 =
  34. 34.23 + 49 =
  35. 35.84 + 31 =
  36. 36.57 + 81 =
  37. 37.70 + 43 =
  38. 38.32 + 53 =
  39. 39.54 + 25 =
  40. 40.27 + 61 =

Answer key

  1. 134
  2. 85
  3. 95
  4. 96
  5. 35
  6. 93
  7. 71
  8. 115
  9. 101
  10. 56
  11. 101
  12. 55
  13. 120
  14. 122
  15. 132
  16. 126
  17. 82
  18. 68
  19. 105
  20. 119
  21. 98
  22. 65
  23. 101
  24. 119
  25. 90
  26. 110
  27. 48
  28. 109
  29. 131
  30. 114
  31. 70
  32. 109
  33. 75
  34. 72
  35. 115
  36. 138
  37. 113
  38. 85
  39. 79
  40. 88

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