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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 313 · 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. 1.27 + 59 =
  2. 2.89 + 64 =
  3. 3.75 + 31 =
  4. 4.89 + 49 =
  5. 5.56 + 79 =
  6. 6.23 + 51 =
  7. 7.78 + 21 =
  8. 8.48 + 53 =
  9. 9.35 + 58 =
  10. 10.61 + 75 =
  11. 11.39 + 47 =
  12. 12.51 + 14 =
  13. 13.69 + 21 =
  14. 14.51 + 12 =
  15. 15.28 + 32 =
  16. 16.46 + 78 =
  17. 17.52 + 54 =
  18. 18.60 + 66 =
  19. 19.77 + 38 =
  20. 20.31 + 24 =
  21. 21.39 + 54 =
  22. 22.33 + 12 =
  23. 23.35 + 39 =
  24. 24.21 + 16 =
  25. 25.79 + 39 =
  26. 26.46 + 86 =
  27. 27.37 + 33 =
  28. 28.78 + 23 =
  29. 29.78 + 58 =
  30. 30.24 + 25 =
  31. 31.38 + 54 =
  32. 32.86 + 13 =
  33. 33.30 + 64 =
  34. 34.34 + 75 =
  35. 35.31 + 13 =
  36. 36.76 + 25 =
  37. 37.38 + 26 =
  38. 38.66 + 46 =
  39. 39.40 + 73 =
  40. 40.37 + 12 =

Answer key

  1. 86
  2. 153
  3. 106
  4. 138
  5. 135
  6. 74
  7. 99
  8. 101
  9. 93
  10. 136
  11. 86
  12. 65
  13. 90
  14. 63
  15. 60
  16. 124
  17. 106
  18. 126
  19. 115
  20. 55
  21. 93
  22. 45
  23. 74
  24. 37
  25. 118
  26. 132
  27. 70
  28. 101
  29. 136
  30. 49
  31. 92
  32. 99
  33. 94
  34. 109
  35. 44
  36. 101
  37. 64
  38. 112
  39. 113
  40. 49

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