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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 124 · 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. 1.39 + 47 =
  2. 2.25 + 75 =
  3. 3.58 + 33 =
  4. 4.64 + 13 =
  5. 5.36 + 61 =
  6. 6.77 + 16 =
  7. 7.23 + 15 =
  8. 8.39 + 37 =
  9. 9.63 + 31 =
  10. 10.79 + 59 =
  11. 11.30 + 16 =
  12. 12.81 + 68 =
  13. 13.59 + 67 =
  14. 14.32 + 21 =
  15. 15.28 + 21 =
  16. 16.24 + 78 =
  17. 17.53 + 55 =
  18. 18.43 + 12 =
  19. 19.39 + 75 =
  20. 20.35 + 63 =
  21. 21.56 + 22 =
  22. 22.41 + 16 =
  23. 23.72 + 51 =
  24. 24.52 + 21 =
  25. 25.21 + 57 =
  26. 26.70 + 18 =
  27. 27.65 + 17 =
  28. 28.41 + 24 =
  29. 29.42 + 16 =
  30. 30.78 + 48 =
  31. 31.57 + 38 =
  32. 32.39 + 33 =
  33. 33.82 + 76 =
  34. 34.30 + 53 =
  35. 35.35 + 61 =
  36. 36.24 + 51 =
  37. 37.62 + 17 =
  38. 38.80 + 62 =
  39. 39.41 + 77 =
  40. 40.79 + 36 =

Answer key

  1. 86
  2. 100
  3. 91
  4. 77
  5. 97
  6. 93
  7. 38
  8. 76
  9. 94
  10. 138
  11. 46
  12. 149
  13. 126
  14. 53
  15. 49
  16. 102
  17. 108
  18. 55
  19. 114
  20. 98
  21. 78
  22. 57
  23. 123
  24. 73
  25. 78
  26. 88
  27. 82
  28. 65
  29. 58
  30. 126
  31. 95
  32. 72
  33. 158
  34. 83
  35. 96
  36. 75
  37. 79
  38. 142
  39. 118
  40. 115

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