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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 281 · 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. 1.56 + 71 =
  2. 2.70 + 52 =
  3. 3.22 + 12 =
  4. 4.85 + 33 =
  5. 5.52 + 39 =
  6. 6.45 + 71 =
  7. 7.28 + 49 =
  8. 8.50 + 56 =
  9. 9.67 + 41 =
  10. 10.58 + 25 =
  11. 11.34 + 52 =
  12. 12.21 + 63 =
  13. 13.89 + 56 =
  14. 14.35 + 72 =
  15. 15.55 + 57 =
  16. 16.30 + 57 =
  17. 17.46 + 81 =
  18. 18.62 + 27 =
  19. 19.32 + 21 =
  20. 20.84 + 46 =
  21. 21.60 + 31 =
  22. 22.51 + 14 =
  23. 23.36 + 44 =
  24. 24.31 + 45 =
  25. 25.27 + 63 =
  26. 26.70 + 44 =
  27. 27.34 + 86 =
  28. 28.60 + 74 =
  29. 29.67 + 87 =
  30. 30.76 + 44 =
  31. 31.73 + 81 =
  32. 32.57 + 66 =
  33. 33.77 + 42 =
  34. 34.24 + 59 =
  35. 35.24 + 76 =
  36. 36.85 + 45 =
  37. 37.35 + 52 =
  38. 38.27 + 54 =
  39. 39.66 + 74 =
  40. 40.27 + 38 =

Answer key

  1. 127
  2. 122
  3. 34
  4. 118
  5. 91
  6. 116
  7. 77
  8. 106
  9. 108
  10. 83
  11. 86
  12. 84
  13. 145
  14. 107
  15. 112
  16. 87
  17. 127
  18. 89
  19. 53
  20. 130
  21. 91
  22. 65
  23. 80
  24. 76
  25. 90
  26. 114
  27. 120
  28. 134
  29. 154
  30. 120
  31. 154
  32. 123
  33. 119
  34. 83
  35. 100
  36. 130
  37. 87
  38. 81
  39. 140
  40. 65

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