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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 993 · 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. 1.88 + 16 =
  2. 2.32 + 16 =
  3. 3.39 + 83 =
  4. 4.61 + 56 =
  5. 5.37 + 16 =
  6. 6.74 + 89 =
  7. 7.26 + 41 =
  8. 8.72 + 36 =
  9. 9.48 + 52 =
  10. 10.24 + 52 =
  11. 11.32 + 17 =
  12. 12.37 + 79 =
  13. 13.83 + 76 =
  14. 14.34 + 51 =
  15. 15.41 + 13 =
  16. 16.26 + 31 =
  17. 17.50 + 24 =
  18. 18.75 + 31 =
  19. 19.67 + 31 =
  20. 20.27 + 26 =
  21. 21.85 + 53 =
  22. 22.35 + 21 =
  23. 23.81 + 58 =
  24. 24.36 + 16 =
  25. 25.22 + 18 =
  26. 26.35 + 81 =
  27. 27.33 + 79 =
  28. 28.41 + 47 =
  29. 29.56 + 19 =
  30. 30.46 + 78 =
  31. 31.52 + 69 =
  32. 32.32 + 24 =
  33. 33.57 + 51 =
  34. 34.59 + 89 =
  35. 35.52 + 81 =
  36. 36.38 + 65 =
  37. 37.32 + 34 =
  38. 38.80 + 16 =
  39. 39.65 + 12 =
  40. 40.27 + 83 =

Answer key

  1. 104
  2. 48
  3. 122
  4. 117
  5. 53
  6. 163
  7. 67
  8. 108
  9. 100
  10. 76
  11. 49
  12. 116
  13. 159
  14. 85
  15. 54
  16. 57
  17. 74
  18. 106
  19. 98
  20. 53
  21. 138
  22. 56
  23. 139
  24. 52
  25. 40
  26. 116
  27. 112
  28. 88
  29. 75
  30. 124
  31. 121
  32. 56
  33. 108
  34. 148
  35. 133
  36. 103
  37. 66
  38. 96
  39. 77
  40. 110

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