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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 703 · 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. 1.81 + 81 =
  2. 2.33 + 31 =
  3. 3.80 + 59 =
  4. 4.34 + 21 =
  5. 5.53 + 47 =
  6. 6.56 + 33 =
  7. 7.39 + 42 =
  8. 8.56 + 38 =
  9. 9.69 + 53 =
  10. 10.77 + 23 =
  11. 11.28 + 81 =
  12. 12.31 + 46 =
  13. 13.50 + 81 =
  14. 14.23 + 34 =
  15. 15.25 + 39 =
  16. 16.21 + 64 =
  17. 17.22 + 55 =
  18. 18.23 + 69 =
  19. 19.36 + 47 =
  20. 20.70 + 35 =
  21. 21.65 + 21 =
  22. 22.82 + 63 =
  23. 23.45 + 82 =
  24. 24.21 + 31 =
  25. 25.77 + 65 =
  26. 26.63 + 84 =
  27. 27.23 + 21 =
  28. 28.78 + 58 =
  29. 29.45 + 83 =
  30. 30.45 + 46 =
  31. 31.84 + 64 =
  32. 32.79 + 55 =
  33. 33.40 + 76 =
  34. 34.54 + 56 =
  35. 35.72 + 88 =
  36. 36.83 + 25 =
  37. 37.28 + 59 =
  38. 38.83 + 47 =
  39. 39.52 + 56 =
  40. 40.34 + 39 =

Answer key

  1. 162
  2. 64
  3. 139
  4. 55
  5. 100
  6. 89
  7. 81
  8. 94
  9. 122
  10. 100
  11. 109
  12. 77
  13. 131
  14. 57
  15. 64
  16. 85
  17. 77
  18. 92
  19. 83
  20. 105
  21. 86
  22. 145
  23. 127
  24. 52
  25. 142
  26. 147
  27. 44
  28. 136
  29. 128
  30. 91
  31. 148
  32. 134
  33. 116
  34. 110
  35. 160
  36. 108
  37. 87
  38. 130
  39. 108
  40. 73

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