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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 672 · 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. 1.86 + 78 =
  2. 2.39 + 34 =
  3. 3.30 + 62 =
  4. 4.61 + 15 =
  5. 5.32 + 46 =
  6. 6.38 + 51 =
  7. 7.33 + 83 =
  8. 8.52 + 38 =
  9. 9.74 + 52 =
  10. 10.64 + 88 =
  11. 11.69 + 57 =
  12. 12.77 + 71 =
  13. 13.25 + 83 =
  14. 14.73 + 43 =
  15. 15.68 + 26 =
  16. 16.41 + 71 =
  17. 17.89 + 15 =
  18. 18.64 + 41 =
  19. 19.33 + 32 =
  20. 20.88 + 77 =
  21. 21.46 + 57 =
  22. 22.82 + 88 =
  23. 23.22 + 23 =
  24. 24.22 + 17 =
  25. 25.43 + 79 =
  26. 26.76 + 81 =
  27. 27.58 + 51 =
  28. 28.34 + 54 =
  29. 29.59 + 24 =
  30. 30.31 + 31 =
  31. 31.77 + 48 =
  32. 32.40 + 47 =
  33. 33.40 + 39 =
  34. 34.51 + 31 =
  35. 35.86 + 25 =
  36. 36.58 + 17 =
  37. 37.53 + 43 =
  38. 38.85 + 58 =
  39. 39.89 + 22 =
  40. 40.85 + 79 =

Answer key

  1. 164
  2. 73
  3. 92
  4. 76
  5. 78
  6. 89
  7. 116
  8. 90
  9. 126
  10. 152
  11. 126
  12. 148
  13. 108
  14. 116
  15. 94
  16. 112
  17. 104
  18. 105
  19. 65
  20. 165
  21. 103
  22. 170
  23. 45
  24. 39
  25. 122
  26. 157
  27. 109
  28. 88
  29. 83
  30. 62
  31. 125
  32. 87
  33. 79
  34. 82
  35. 111
  36. 75
  37. 96
  38. 143
  39. 111
  40. 164

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