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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 396 · 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. 1.78 + 15 =
  2. 2.21 + 89 =
  3. 3.22 + 57 =
  4. 4.53 + 74 =
  5. 5.21 + 52 =
  6. 6.21 + 55 =
  7. 7.82 + 28 =
  8. 8.88 + 48 =
  9. 9.29 + 88 =
  10. 10.41 + 42 =
  11. 11.28 + 37 =
  12. 12.26 + 81 =
  13. 13.27 + 21 =
  14. 14.81 + 76 =
  15. 15.41 + 25 =
  16. 16.42 + 76 =
  17. 17.34 + 81 =
  18. 18.63 + 61 =
  19. 19.65 + 73 =
  20. 20.49 + 47 =
  21. 21.46 + 83 =
  22. 22.51 + 22 =
  23. 23.21 + 15 =
  24. 24.47 + 42 =
  25. 25.46 + 48 =
  26. 26.77 + 26 =
  27. 27.65 + 61 =
  28. 28.46 + 41 =
  29. 29.83 + 42 =
  30. 30.76 + 65 =
  31. 31.53 + 54 =
  32. 32.65 + 41 =
  33. 33.64 + 22 =
  34. 34.36 + 72 =
  35. 35.24 + 48 =
  36. 36.43 + 54 =
  37. 37.39 + 35 =
  38. 38.24 + 72 =
  39. 39.79 + 63 =
  40. 40.43 + 64 =

Answer key

  1. 93
  2. 110
  3. 79
  4. 127
  5. 73
  6. 76
  7. 110
  8. 136
  9. 117
  10. 83
  11. 65
  12. 107
  13. 48
  14. 157
  15. 66
  16. 118
  17. 115
  18. 124
  19. 138
  20. 96
  21. 129
  22. 73
  23. 36
  24. 89
  25. 94
  26. 103
  27. 126
  28. 87
  29. 125
  30. 141
  31. 107
  32. 106
  33. 86
  34. 108
  35. 72
  36. 97
  37. 74
  38. 96
  39. 142
  40. 107

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