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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 80 · 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. 1.74 + 33 =
  2. 2.51 + 54 =
  3. 3.83 + 33 =
  4. 4.43 + 87 =
  5. 5.41 + 45 =
  6. 6.85 + 68 =
  7. 7.25 + 22 =
  8. 8.26 + 66 =
  9. 9.21 + 52 =
  10. 10.66 + 55 =
  11. 11.47 + 21 =
  12. 12.82 + 82 =
  13. 13.63 + 33 =
  14. 14.35 + 78 =
  15. 15.69 + 88 =
  16. 16.75 + 47 =
  17. 17.44 + 61 =
  18. 18.67 + 49 =
  19. 19.55 + 38 =
  20. 20.44 + 32 =
  21. 21.26 + 74 =
  22. 22.36 + 33 =
  23. 23.30 + 13 =
  24. 24.62 + 24 =
  25. 25.87 + 78 =
  26. 26.59 + 45 =
  27. 27.77 + 51 =
  28. 28.83 + 77 =
  29. 29.37 + 73 =
  30. 30.82 + 63 =
  31. 31.47 + 41 =
  32. 32.60 + 34 =
  33. 33.32 + 35 =
  34. 34.22 + 59 =
  35. 35.45 + 34 =
  36. 36.70 + 71 =
  37. 37.56 + 35 =
  38. 38.24 + 26 =
  39. 39.53 + 41 =
  40. 40.53 + 18 =

Answer key

  1. 107
  2. 105
  3. 116
  4. 130
  5. 86
  6. 153
  7. 47
  8. 92
  9. 73
  10. 121
  11. 68
  12. 164
  13. 96
  14. 113
  15. 157
  16. 122
  17. 105
  18. 116
  19. 93
  20. 76
  21. 100
  22. 69
  23. 43
  24. 86
  25. 165
  26. 104
  27. 128
  28. 160
  29. 110
  30. 145
  31. 88
  32. 94
  33. 67
  34. 81
  35. 79
  36. 141
  37. 91
  38. 50
  39. 94
  40. 71

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