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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 900 · 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. 1.56 + 38 =
  2. 2.42 + 16 =
  3. 3.40 + 14 =
  4. 4.61 + 42 =
  5. 5.47 + 72 =
  6. 6.32 + 23 =
  7. 7.34 + 77 =
  8. 8.40 + 31 =
  9. 9.35 + 54 =
  10. 10.58 + 32 =
  11. 11.44 + 39 =
  12. 12.59 + 82 =
  13. 13.66 + 71 =
  14. 14.67 + 51 =
  15. 15.21 + 47 =
  16. 16.47 + 82 =
  17. 17.24 + 67 =
  18. 18.34 + 51 =
  19. 19.62 + 61 =
  20. 20.75 + 88 =
  21. 21.22 + 79 =
  22. 22.32 + 33 =
  23. 23.88 + 73 =
  24. 24.85 + 88 =
  25. 25.36 + 71 =
  26. 26.47 + 32 =
  27. 27.72 + 77 =
  28. 28.78 + 83 =
  29. 29.53 + 66 =
  30. 30.75 + 74 =
  31. 31.77 + 81 =
  32. 32.60 + 59 =
  33. 33.57 + 26 =
  34. 34.72 + 45 =
  35. 35.23 + 86 =
  36. 36.61 + 27 =
  37. 37.75 + 48 =
  38. 38.88 + 21 =
  39. 39.46 + 45 =
  40. 40.31 + 36 =

Answer key

  1. 94
  2. 58
  3. 54
  4. 103
  5. 119
  6. 55
  7. 111
  8. 71
  9. 89
  10. 90
  11. 83
  12. 141
  13. 137
  14. 118
  15. 68
  16. 129
  17. 91
  18. 85
  19. 123
  20. 163
  21. 101
  22. 65
  23. 161
  24. 173
  25. 107
  26. 79
  27. 149
  28. 161
  29. 119
  30. 149
  31. 158
  32. 119
  33. 83
  34. 117
  35. 109
  36. 88
  37. 123
  38. 109
  39. 91
  40. 67

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