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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 655 · 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. 1.89 + 21 =
  2. 2.28 + 84 =
  3. 3.27 + 17 =
  4. 4.41 + 71 =
  5. 5.25 + 14 =
  6. 6.79 + 61 =
  7. 7.23 + 63 =
  8. 8.62 + 86 =
  9. 9.50 + 51 =
  10. 10.71 + 46 =
  11. 11.32 + 24 =
  12. 12.83 + 21 =
  13. 13.75 + 66 =
  14. 14.64 + 16 =
  15. 15.71 + 21 =
  16. 16.29 + 31 =
  17. 17.84 + 86 =
  18. 18.27 + 29 =
  19. 19.24 + 42 =
  20. 20.72 + 83 =
  21. 21.85 + 28 =
  22. 22.34 + 19 =
  23. 23.87 + 42 =
  24. 24.25 + 62 =
  25. 25.76 + 12 =
  26. 26.46 + 85 =
  27. 27.84 + 67 =
  28. 28.88 + 71 =
  29. 29.70 + 34 =
  30. 30.67 + 33 =
  31. 31.22 + 76 =
  32. 32.43 + 23 =
  33. 33.67 + 74 =
  34. 34.47 + 34 =
  35. 35.37 + 57 =
  36. 36.29 + 44 =
  37. 37.66 + 32 =
  38. 38.43 + 24 =
  39. 39.28 + 41 =
  40. 40.72 + 23 =

Answer key

  1. 110
  2. 112
  3. 44
  4. 112
  5. 39
  6. 140
  7. 86
  8. 148
  9. 101
  10. 117
  11. 56
  12. 104
  13. 141
  14. 80
  15. 92
  16. 60
  17. 170
  18. 56
  19. 66
  20. 155
  21. 113
  22. 53
  23. 129
  24. 87
  25. 88
  26. 131
  27. 151
  28. 159
  29. 104
  30. 100
  31. 98
  32. 66
  33. 141
  34. 81
  35. 94
  36. 73
  37. 98
  38. 67
  39. 69
  40. 95

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