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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 587 · 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. 1.63 + 84 =
  2. 2.65 + 24 =
  3. 3.62 + 24 =
  4. 4.40 + 17 =
  5. 5.37 + 19 =
  6. 6.40 + 41 =
  7. 7.32 + 18 =
  8. 8.28 + 64 =
  9. 9.72 + 81 =
  10. 10.70 + 31 =
  11. 11.52 + 16 =
  12. 12.27 + 57 =
  13. 13.73 + 34 =
  14. 14.74 + 85 =
  15. 15.25 + 77 =
  16. 16.21 + 75 =
  17. 17.58 + 79 =
  18. 18.28 + 68 =
  19. 19.87 + 63 =
  20. 20.41 + 81 =
  21. 21.87 + 38 =
  22. 22.71 + 51 =
  23. 23.68 + 21 =
  24. 24.30 + 47 =
  25. 25.40 + 36 =
  26. 26.56 + 55 =
  27. 27.36 + 75 =
  28. 28.84 + 77 =
  29. 29.50 + 25 =
  30. 30.82 + 36 =
  31. 31.76 + 82 =
  32. 32.27 + 53 =
  33. 33.65 + 57 =
  34. 34.86 + 37 =
  35. 35.34 + 83 =
  36. 36.27 + 85 =
  37. 37.32 + 44 =
  38. 38.49 + 23 =
  39. 39.44 + 86 =
  40. 40.44 + 17 =

Answer key

  1. 147
  2. 89
  3. 86
  4. 57
  5. 56
  6. 81
  7. 50
  8. 92
  9. 153
  10. 101
  11. 68
  12. 84
  13. 107
  14. 159
  15. 102
  16. 96
  17. 137
  18. 96
  19. 150
  20. 122
  21. 125
  22. 122
  23. 89
  24. 77
  25. 76
  26. 111
  27. 111
  28. 161
  29. 75
  30. 118
  31. 158
  32. 80
  33. 122
  34. 123
  35. 117
  36. 112
  37. 76
  38. 72
  39. 130
  40. 61

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