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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 523 · 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. 1.89 + 87 =
  2. 2.31 + 64 =
  3. 3.34 + 34 =
  4. 4.73 + 13 =
  5. 5.32 + 24 =
  6. 6.26 + 47 =
  7. 7.69 + 37 =
  8. 8.58 + 74 =
  9. 9.63 + 17 =
  10. 10.27 + 49 =
  11. 11.60 + 21 =
  12. 12.44 + 28 =
  13. 13.28 + 73 =
  14. 14.64 + 51 =
  15. 15.23 + 13 =
  16. 16.74 + 69 =
  17. 17.27 + 59 =
  18. 18.28 + 61 =
  19. 19.74 + 28 =
  20. 20.89 + 61 =
  21. 21.83 + 53 =
  22. 22.35 + 14 =
  23. 23.37 + 86 =
  24. 24.22 + 36 =
  25. 25.51 + 41 =
  26. 26.75 + 64 =
  27. 27.69 + 28 =
  28. 28.51 + 47 =
  29. 29.30 + 24 =
  30. 30.24 + 21 =
  31. 31.39 + 21 =
  32. 32.25 + 26 =
  33. 33.80 + 28 =
  34. 34.34 + 81 =
  35. 35.27 + 24 =
  36. 36.78 + 81 =
  37. 37.79 + 79 =
  38. 38.36 + 23 =
  39. 39.52 + 41 =
  40. 40.60 + 44 =

Answer key

  1. 176
  2. 95
  3. 68
  4. 86
  5. 56
  6. 73
  7. 106
  8. 132
  9. 80
  10. 76
  11. 81
  12. 72
  13. 101
  14. 115
  15. 36
  16. 143
  17. 86
  18. 89
  19. 102
  20. 150
  21. 136
  22. 49
  23. 123
  24. 58
  25. 92
  26. 139
  27. 97
  28. 98
  29. 54
  30. 45
  31. 60
  32. 51
  33. 108
  34. 115
  35. 51
  36. 159
  37. 158
  38. 59
  39. 93
  40. 104

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