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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 755 · 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. 1.42 + 38 =
  2. 2.48 + 36 =
  3. 3.89 + 73 =
  4. 4.58 + 73 =
  5. 5.25 + 23 =
  6. 6.52 + 17 =
  7. 7.53 + 25 =
  8. 8.59 + 12 =
  9. 9.46 + 31 =
  10. 10.88 + 13 =
  11. 11.72 + 14 =
  12. 12.64 + 37 =
  13. 13.82 + 77 =
  14. 14.79 + 13 =
  15. 15.48 + 69 =
  16. 16.70 + 47 =
  17. 17.83 + 35 =
  18. 18.73 + 69 =
  19. 19.40 + 12 =
  20. 20.24 + 34 =
  21. 21.58 + 51 =
  22. 22.29 + 73 =
  23. 23.66 + 69 =
  24. 24.41 + 81 =
  25. 25.79 + 82 =
  26. 26.79 + 69 =
  27. 27.76 + 62 =
  28. 28.21 + 75 =
  29. 29.36 + 67 =
  30. 30.37 + 53 =
  31. 31.35 + 53 =
  32. 32.77 + 57 =
  33. 33.34 + 53 =
  34. 34.34 + 51 =
  35. 35.33 + 69 =
  36. 36.71 + 79 =
  37. 37.53 + 46 =
  38. 38.62 + 21 =
  39. 39.33 + 34 =
  40. 40.42 + 18 =

Answer key

  1. 80
  2. 84
  3. 162
  4. 131
  5. 48
  6. 69
  7. 78
  8. 71
  9. 77
  10. 101
  11. 86
  12. 101
  13. 159
  14. 92
  15. 117
  16. 117
  17. 118
  18. 142
  19. 52
  20. 58
  21. 109
  22. 102
  23. 135
  24. 122
  25. 161
  26. 148
  27. 138
  28. 96
  29. 103
  30. 90
  31. 88
  32. 134
  33. 87
  34. 85
  35. 102
  36. 150
  37. 99
  38. 83
  39. 67
  40. 60

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