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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 608 · 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. 1.80 + 66 =
  2. 2.35 + 79 =
  3. 3.68 + 19 =
  4. 4.25 + 31 =
  5. 5.64 + 81 =
  6. 6.50 + 58 =
  7. 7.37 + 39 =
  8. 8.81 + 56 =
  9. 9.24 + 18 =
  10. 10.58 + 64 =
  11. 11.83 + 35 =
  12. 12.68 + 58 =
  13. 13.38 + 22 =
  14. 14.49 + 16 =
  15. 15.64 + 37 =
  16. 16.49 + 82 =
  17. 17.81 + 12 =
  18. 18.67 + 36 =
  19. 19.79 + 19 =
  20. 20.66 + 24 =
  21. 21.34 + 75 =
  22. 22.46 + 78 =
  23. 23.25 + 61 =
  24. 24.23 + 65 =
  25. 25.24 + 51 =
  26. 26.27 + 68 =
  27. 27.75 + 14 =
  28. 28.50 + 82 =
  29. 29.29 + 52 =
  30. 30.52 + 64 =
  31. 31.49 + 36 =
  32. 32.24 + 55 =
  33. 33.41 + 52 =
  34. 34.55 + 87 =
  35. 35.54 + 41 =
  36. 36.25 + 51 =
  37. 37.40 + 29 =
  38. 38.45 + 65 =
  39. 39.50 + 33 =
  40. 40.68 + 46 =

Answer key

  1. 146
  2. 114
  3. 87
  4. 56
  5. 145
  6. 108
  7. 76
  8. 137
  9. 42
  10. 122
  11. 118
  12. 126
  13. 60
  14. 65
  15. 101
  16. 131
  17. 93
  18. 103
  19. 98
  20. 90
  21. 109
  22. 124
  23. 86
  24. 88
  25. 75
  26. 95
  27. 89
  28. 132
  29. 81
  30. 116
  31. 85
  32. 79
  33. 93
  34. 142
  35. 95
  36. 76
  37. 69
  38. 110
  39. 83
  40. 114

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