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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 371 · 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. 1.85 + 81 =
  2. 2.62 + 48 =
  3. 3.34 + 78 =
  4. 4.49 + 17 =
  5. 5.40 + 28 =
  6. 6.84 + 56 =
  7. 7.23 + 82 =
  8. 8.43 + 51 =
  9. 9.31 + 19 =
  10. 10.73 + 61 =
  11. 11.35 + 61 =
  12. 12.37 + 83 =
  13. 13.77 + 68 =
  14. 14.41 + 29 =
  15. 15.50 + 52 =
  16. 16.63 + 25 =
  17. 17.58 + 61 =
  18. 18.71 + 81 =
  19. 19.32 + 43 =
  20. 20.63 + 48 =
  21. 21.34 + 63 =
  22. 22.34 + 26 =
  23. 23.59 + 89 =
  24. 24.84 + 85 =
  25. 25.60 + 19 =
  26. 26.52 + 71 =
  27. 27.82 + 38 =
  28. 28.71 + 53 =
  29. 29.50 + 38 =
  30. 30.72 + 73 =
  31. 31.21 + 21 =
  32. 32.37 + 31 =
  33. 33.30 + 33 =
  34. 34.58 + 17 =
  35. 35.46 + 62 =
  36. 36.56 + 31 =
  37. 37.37 + 25 =
  38. 38.89 + 36 =
  39. 39.45 + 38 =
  40. 40.24 + 25 =

Answer key

  1. 166
  2. 110
  3. 112
  4. 66
  5. 68
  6. 140
  7. 105
  8. 94
  9. 50
  10. 134
  11. 96
  12. 120
  13. 145
  14. 70
  15. 102
  16. 88
  17. 119
  18. 152
  19. 75
  20. 111
  21. 97
  22. 60
  23. 148
  24. 169
  25. 79
  26. 123
  27. 120
  28. 124
  29. 88
  30. 145
  31. 42
  32. 68
  33. 63
  34. 75
  35. 108
  36. 87
  37. 62
  38. 125
  39. 83
  40. 49

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