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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 969 · 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. 1.23 + 87 =
  2. 2.55 + 21 =
  3. 3.45 + 37 =
  4. 4.28 + 63 =
  5. 5.49 + 53 =
  6. 6.50 + 21 =
  7. 7.55 + 53 =
  8. 8.64 + 31 =
  9. 9.64 + 79 =
  10. 10.47 + 68 =
  11. 11.70 + 17 =
  12. 12.83 + 47 =
  13. 13.61 + 19 =
  14. 14.60 + 22 =
  15. 15.53 + 29 =
  16. 16.47 + 86 =
  17. 17.62 + 45 =
  18. 18.57 + 33 =
  19. 19.63 + 58 =
  20. 20.32 + 76 =
  21. 21.34 + 48 =
  22. 22.21 + 13 =
  23. 23.56 + 78 =
  24. 24.26 + 31 =
  25. 25.75 + 83 =
  26. 26.45 + 48 =
  27. 27.38 + 51 =
  28. 28.77 + 61 =
  29. 29.67 + 88 =
  30. 30.40 + 31 =
  31. 31.84 + 19 =
  32. 32.24 + 54 =
  33. 33.26 + 41 =
  34. 34.86 + 24 =
  35. 35.70 + 65 =
  36. 36.23 + 82 =
  37. 37.60 + 89 =
  38. 38.33 + 19 =
  39. 39.78 + 53 =
  40. 40.30 + 34 =

Answer key

  1. 110
  2. 76
  3. 82
  4. 91
  5. 102
  6. 71
  7. 108
  8. 95
  9. 143
  10. 115
  11. 87
  12. 130
  13. 80
  14. 82
  15. 82
  16. 133
  17. 107
  18. 90
  19. 121
  20. 108
  21. 82
  22. 34
  23. 134
  24. 57
  25. 158
  26. 93
  27. 89
  28. 138
  29. 155
  30. 71
  31. 103
  32. 78
  33. 67
  34. 110
  35. 135
  36. 105
  37. 149
  38. 52
  39. 131
  40. 64

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