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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 518 · 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. 1.25 + 46 =
  2. 2.41 + 67 =
  3. 3.80 + 79 =
  4. 4.48 + 41 =
  5. 5.39 + 69 =
  6. 6.54 + 18 =
  7. 7.26 + 54 =
  8. 8.51 + 19 =
  9. 9.67 + 33 =
  10. 10.27 + 33 =
  11. 11.30 + 72 =
  12. 12.62 + 32 =
  13. 13.41 + 61 =
  14. 14.51 + 15 =
  15. 15.70 + 67 =
  16. 16.29 + 85 =
  17. 17.87 + 75 =
  18. 18.52 + 34 =
  19. 19.87 + 64 =
  20. 20.80 + 73 =
  21. 21.86 + 49 =
  22. 22.34 + 27 =
  23. 23.73 + 25 =
  24. 24.78 + 24 =
  25. 25.73 + 79 =
  26. 26.44 + 47 =
  27. 27.88 + 44 =
  28. 28.68 + 34 =
  29. 29.21 + 59 =
  30. 30.53 + 74 =
  31. 31.88 + 86 =
  32. 32.52 + 25 =
  33. 33.62 + 61 =
  34. 34.75 + 81 =
  35. 35.82 + 12 =
  36. 36.32 + 77 =
  37. 37.37 + 59 =
  38. 38.34 + 71 =
  39. 39.24 + 87 =
  40. 40.75 + 58 =

Answer key

  1. 71
  2. 108
  3. 159
  4. 89
  5. 108
  6. 72
  7. 80
  8. 70
  9. 100
  10. 60
  11. 102
  12. 94
  13. 102
  14. 66
  15. 137
  16. 114
  17. 162
  18. 86
  19. 151
  20. 153
  21. 135
  22. 61
  23. 98
  24. 102
  25. 152
  26. 91
  27. 132
  28. 102
  29. 80
  30. 127
  31. 174
  32. 77
  33. 123
  34. 156
  35. 94
  36. 109
  37. 96
  38. 105
  39. 111
  40. 133

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