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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 110 · 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. 1.55 + 44 =
  2. 2.43 + 55 =
  3. 3.32 + 15 =
  4. 4.85 + 51 =
  5. 5.28 + 36 =
  6. 6.24 + 72 =
  7. 7.38 + 18 =
  8. 8.42 + 74 =
  9. 9.61 + 73 =
  10. 10.76 + 23 =
  11. 11.34 + 78 =
  12. 12.70 + 12 =
  13. 13.83 + 51 =
  14. 14.59 + 35 =
  15. 15.37 + 56 =
  16. 16.81 + 24 =
  17. 17.33 + 82 =
  18. 18.68 + 52 =
  19. 19.43 + 51 =
  20. 20.49 + 39 =
  21. 21.28 + 21 =
  22. 22.66 + 61 =
  23. 23.76 + 74 =
  24. 24.55 + 15 =
  25. 25.58 + 72 =
  26. 26.71 + 13 =
  27. 27.27 + 25 =
  28. 28.52 + 87 =
  29. 29.32 + 51 =
  30. 30.38 + 49 =
  31. 31.57 + 16 =
  32. 32.63 + 15 =
  33. 33.24 + 26 =
  34. 34.38 + 39 =
  35. 35.89 + 88 =
  36. 36.38 + 17 =
  37. 37.75 + 51 =
  38. 38.54 + 46 =
  39. 39.55 + 29 =
  40. 40.30 + 81 =

Answer key

  1. 99
  2. 98
  3. 47
  4. 136
  5. 64
  6. 96
  7. 56
  8. 116
  9. 134
  10. 99
  11. 112
  12. 82
  13. 134
  14. 94
  15. 93
  16. 105
  17. 115
  18. 120
  19. 94
  20. 88
  21. 49
  22. 127
  23. 150
  24. 70
  25. 130
  26. 84
  27. 52
  28. 139
  29. 83
  30. 87
  31. 73
  32. 78
  33. 50
  34. 77
  35. 177
  36. 55
  37. 126
  38. 100
  39. 84
  40. 111

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