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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 998 · 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. 1.50 + 54 =
  2. 2.71 + 55 =
  3. 3.50 + 27 =
  4. 4.51 + 54 =
  5. 5.83 + 74 =
  6. 6.76 + 75 =
  7. 7.32 + 82 =
  8. 8.36 + 16 =
  9. 9.48 + 62 =
  10. 10.37 + 25 =
  11. 11.27 + 54 =
  12. 12.24 + 15 =
  13. 13.82 + 42 =
  14. 14.87 + 33 =
  15. 15.57 + 37 =
  16. 16.65 + 88 =
  17. 17.79 + 84 =
  18. 18.47 + 25 =
  19. 19.65 + 84 =
  20. 20.33 + 12 =
  21. 21.89 + 79 =
  22. 22.59 + 69 =
  23. 23.65 + 72 =
  24. 24.60 + 46 =
  25. 25.47 + 26 =
  26. 26.67 + 41 =
  27. 27.67 + 26 =
  28. 28.52 + 33 =
  29. 29.70 + 26 =
  30. 30.52 + 26 =
  31. 31.51 + 29 =
  32. 32.71 + 69 =
  33. 33.61 + 59 =
  34. 34.57 + 83 =
  35. 35.36 + 19 =
  36. 36.60 + 86 =
  37. 37.85 + 32 =
  38. 38.22 + 79 =
  39. 39.86 + 67 =
  40. 40.29 + 33 =

Answer key

  1. 104
  2. 126
  3. 77
  4. 105
  5. 157
  6. 151
  7. 114
  8. 52
  9. 110
  10. 62
  11. 81
  12. 39
  13. 124
  14. 120
  15. 94
  16. 153
  17. 163
  18. 72
  19. 149
  20. 45
  21. 168
  22. 128
  23. 137
  24. 106
  25. 73
  26. 108
  27. 93
  28. 85
  29. 96
  30. 78
  31. 80
  32. 140
  33. 120
  34. 140
  35. 55
  36. 146
  37. 117
  38. 101
  39. 153
  40. 62

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