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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 775 · 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. 1.73 + 59 =
  2. 2.22 + 65 =
  3. 3.36 + 18 =
  4. 4.57 + 42 =
  5. 5.73 + 31 =
  6. 6.44 + 47 =
  7. 7.87 + 57 =
  8. 8.68 + 35 =
  9. 9.42 + 67 =
  10. 10.37 + 73 =
  11. 11.47 + 56 =
  12. 12.32 + 31 =
  13. 13.28 + 23 =
  14. 14.48 + 64 =
  15. 15.74 + 58 =
  16. 16.45 + 57 =
  17. 17.76 + 82 =
  18. 18.44 + 36 =
  19. 19.30 + 62 =
  20. 20.21 + 25 =
  21. 21.50 + 14 =
  22. 22.76 + 15 =
  23. 23.22 + 83 =
  24. 24.72 + 39 =
  25. 25.31 + 77 =
  26. 26.78 + 42 =
  27. 27.54 + 56 =
  28. 28.87 + 89 =
  29. 29.85 + 21 =
  30. 30.66 + 58 =
  31. 31.22 + 53 =
  32. 32.39 + 88 =
  33. 33.84 + 15 =
  34. 34.59 + 13 =
  35. 35.48 + 61 =
  36. 36.30 + 51 =
  37. 37.45 + 81 =
  38. 38.40 + 37 =
  39. 39.77 + 75 =
  40. 40.43 + 29 =

Answer key

  1. 132
  2. 87
  3. 54
  4. 99
  5. 104
  6. 91
  7. 144
  8. 103
  9. 109
  10. 110
  11. 103
  12. 63
  13. 51
  14. 112
  15. 132
  16. 102
  17. 158
  18. 80
  19. 92
  20. 46
  21. 64
  22. 91
  23. 105
  24. 111
  25. 108
  26. 120
  27. 110
  28. 176
  29. 106
  30. 124
  31. 75
  32. 127
  33. 99
  34. 72
  35. 109
  36. 81
  37. 126
  38. 77
  39. 152
  40. 72

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