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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 354 · 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. 1.33 + 82 =
  2. 2.61 + 34 =
  3. 3.69 + 28 =
  4. 4.66 + 69 =
  5. 5.69 + 67 =
  6. 6.37 + 32 =
  7. 7.41 + 79 =
  8. 8.38 + 18 =
  9. 9.40 + 68 =
  10. 10.79 + 24 =
  11. 11.85 + 62 =
  12. 12.77 + 59 =
  13. 13.63 + 38 =
  14. 14.45 + 28 =
  15. 15.62 + 88 =
  16. 16.87 + 85 =
  17. 17.62 + 73 =
  18. 18.44 + 44 =
  19. 19.30 + 31 =
  20. 20.66 + 45 =
  21. 21.31 + 55 =
  22. 22.50 + 48 =
  23. 23.79 + 51 =
  24. 24.85 + 35 =
  25. 25.77 + 63 =
  26. 26.35 + 64 =
  27. 27.39 + 45 =
  28. 28.21 + 57 =
  29. 29.47 + 38 =
  30. 30.73 + 71 =
  31. 31.26 + 68 =
  32. 32.74 + 15 =
  33. 33.72 + 53 =
  34. 34.55 + 14 =
  35. 35.63 + 52 =
  36. 36.37 + 76 =
  37. 37.36 + 77 =
  38. 38.23 + 31 =
  39. 39.25 + 57 =
  40. 40.24 + 59 =

Answer key

  1. 115
  2. 95
  3. 97
  4. 135
  5. 136
  6. 69
  7. 120
  8. 56
  9. 108
  10. 103
  11. 147
  12. 136
  13. 101
  14. 73
  15. 150
  16. 172
  17. 135
  18. 88
  19. 61
  20. 111
  21. 86
  22. 98
  23. 130
  24. 120
  25. 140
  26. 99
  27. 84
  28. 78
  29. 85
  30. 144
  31. 94
  32. 89
  33. 125
  34. 69
  35. 115
  36. 113
  37. 113
  38. 54
  39. 82
  40. 83

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