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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 575 · 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. 1.66 + 74 =
  2. 2.46 + 62 =
  3. 3.36 + 23 =
  4. 4.86 + 25 =
  5. 5.22 + 37 =
  6. 6.43 + 31 =
  7. 7.22 + 58 =
  8. 8.51 + 15 =
  9. 9.60 + 63 =
  10. 10.74 + 55 =
  11. 11.50 + 54 =
  12. 12.62 + 51 =
  13. 13.73 + 41 =
  14. 14.85 + 85 =
  15. 15.60 + 77 =
  16. 16.28 + 34 =
  17. 17.34 + 83 =
  18. 18.61 + 25 =
  19. 19.54 + 34 =
  20. 20.44 + 31 =
  21. 21.56 + 33 =
  22. 22.76 + 48 =
  23. 23.88 + 53 =
  24. 24.24 + 78 =
  25. 25.68 + 54 =
  26. 26.89 + 19 =
  27. 27.43 + 27 =
  28. 28.76 + 31 =
  29. 29.26 + 47 =
  30. 30.65 + 71 =
  31. 31.30 + 14 =
  32. 32.44 + 46 =
  33. 33.38 + 68 =
  34. 34.25 + 68 =
  35. 35.38 + 19 =
  36. 36.55 + 21 =
  37. 37.45 + 23 =
  38. 38.67 + 51 =
  39. 39.49 + 82 =
  40. 40.22 + 82 =

Answer key

  1. 140
  2. 108
  3. 59
  4. 111
  5. 59
  6. 74
  7. 80
  8. 66
  9. 123
  10. 129
  11. 104
  12. 113
  13. 114
  14. 170
  15. 137
  16. 62
  17. 117
  18. 86
  19. 88
  20. 75
  21. 89
  22. 124
  23. 141
  24. 102
  25. 122
  26. 108
  27. 70
  28. 107
  29. 73
  30. 136
  31. 44
  32. 90
  33. 106
  34. 93
  35. 57
  36. 76
  37. 68
  38. 118
  39. 131
  40. 104

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