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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 496 · 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. 1.22 + 78 =
  2. 2.84 + 85 =
  3. 3.33 + 19 =
  4. 4.47 + 27 =
  5. 5.24 + 41 =
  6. 6.46 + 18 =
  7. 7.69 + 39 =
  8. 8.56 + 35 =
  9. 9.74 + 31 =
  10. 10.53 + 58 =
  11. 11.65 + 87 =
  12. 12.30 + 81 =
  13. 13.73 + 77 =
  14. 14.58 + 48 =
  15. 15.41 + 49 =
  16. 16.63 + 36 =
  17. 17.35 + 23 =
  18. 18.54 + 68 =
  19. 19.65 + 68 =
  20. 20.71 + 48 =
  21. 21.82 + 49 =
  22. 22.83 + 75 =
  23. 23.21 + 26 =
  24. 24.28 + 35 =
  25. 25.66 + 56 =
  26. 26.68 + 88 =
  27. 27.38 + 22 =
  28. 28.58 + 81 =
  29. 29.37 + 73 =
  30. 30.47 + 71 =
  31. 31.27 + 31 =
  32. 32.68 + 81 =
  33. 33.23 + 64 =
  34. 34.63 + 75 =
  35. 35.33 + 78 =
  36. 36.48 + 51 =
  37. 37.24 + 72 =
  38. 38.24 + 73 =
  39. 39.28 + 41 =
  40. 40.66 + 15 =

Answer key

  1. 100
  2. 169
  3. 52
  4. 74
  5. 65
  6. 64
  7. 108
  8. 91
  9. 105
  10. 111
  11. 152
  12. 111
  13. 150
  14. 106
  15. 90
  16. 99
  17. 58
  18. 122
  19. 133
  20. 119
  21. 131
  22. 158
  23. 47
  24. 63
  25. 122
  26. 156
  27. 60
  28. 139
  29. 110
  30. 118
  31. 58
  32. 149
  33. 87
  34. 138
  35. 111
  36. 99
  37. 96
  38. 97
  39. 69
  40. 81

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