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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 273 · 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. 1.60 + 22 =
  2. 2.71 + 57 =
  3. 3.70 + 25 =
  4. 4.44 + 45 =
  5. 5.21 + 43 =
  6. 6.82 + 29 =
  7. 7.66 + 86 =
  8. 8.83 + 44 =
  9. 9.46 + 51 =
  10. 10.84 + 68 =
  11. 11.51 + 63 =
  12. 12.26 + 51 =
  13. 13.37 + 19 =
  14. 14.81 + 36 =
  15. 15.63 + 17 =
  16. 16.55 + 85 =
  17. 17.35 + 21 =
  18. 18.63 + 32 =
  19. 19.51 + 36 =
  20. 20.32 + 21 =
  21. 21.26 + 13 =
  22. 22.28 + 47 =
  23. 23.38 + 88 =
  24. 24.70 + 33 =
  25. 25.28 + 79 =
  26. 26.57 + 27 =
  27. 27.29 + 46 =
  28. 28.60 + 74 =
  29. 29.56 + 42 =
  30. 30.23 + 71 =
  31. 31.57 + 36 =
  32. 32.31 + 48 =
  33. 33.39 + 52 =
  34. 34.78 + 16 =
  35. 35.21 + 33 =
  36. 36.37 + 47 =
  37. 37.79 + 75 =
  38. 38.43 + 24 =
  39. 39.46 + 15 =
  40. 40.73 + 35 =

Answer key

  1. 82
  2. 128
  3. 95
  4. 89
  5. 64
  6. 111
  7. 152
  8. 127
  9. 97
  10. 152
  11. 114
  12. 77
  13. 56
  14. 117
  15. 80
  16. 140
  17. 56
  18. 95
  19. 87
  20. 53
  21. 39
  22. 75
  23. 126
  24. 103
  25. 107
  26. 84
  27. 75
  28. 134
  29. 98
  30. 94
  31. 93
  32. 79
  33. 91
  34. 94
  35. 54
  36. 84
  37. 154
  38. 67
  39. 61
  40. 108

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