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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 985 · 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. 1.89 + 88 =
  2. 2.76 + 73 =
  3. 3.74 + 71 =
  4. 4.25 + 13 =
  5. 5.44 + 66 =
  6. 6.66 + 64 =
  7. 7.38 + 61 =
  8. 8.34 + 18 =
  9. 9.30 + 42 =
  10. 10.43 + 31 =
  11. 11.36 + 46 =
  12. 12.78 + 47 =
  13. 13.88 + 78 =
  14. 14.79 + 79 =
  15. 15.89 + 13 =
  16. 16.56 + 41 =
  17. 17.36 + 26 =
  18. 18.27 + 26 =
  19. 19.44 + 37 =
  20. 20.22 + 37 =
  21. 21.34 + 88 =
  22. 22.44 + 48 =
  23. 23.38 + 31 =
  24. 24.23 + 31 =
  25. 25.64 + 19 =
  26. 26.54 + 63 =
  27. 27.47 + 65 =
  28. 28.50 + 27 =
  29. 29.47 + 53 =
  30. 30.42 + 88 =
  31. 31.26 + 44 =
  32. 32.44 + 21 =
  33. 33.27 + 38 =
  34. 34.45 + 76 =
  35. 35.86 + 61 =
  36. 36.36 + 74 =
  37. 37.21 + 31 =
  38. 38.31 + 64 =
  39. 39.39 + 29 =
  40. 40.31 + 57 =

Answer key

  1. 177
  2. 149
  3. 145
  4. 38
  5. 110
  6. 130
  7. 99
  8. 52
  9. 72
  10. 74
  11. 82
  12. 125
  13. 166
  14. 158
  15. 102
  16. 97
  17. 62
  18. 53
  19. 81
  20. 59
  21. 122
  22. 92
  23. 69
  24. 54
  25. 83
  26. 117
  27. 112
  28. 77
  29. 100
  30. 130
  31. 70
  32. 65
  33. 65
  34. 121
  35. 147
  36. 110
  37. 52
  38. 95
  39. 68
  40. 88

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