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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 652 · 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 + 51 =
  2. 2.71 + 19 =
  3. 3.48 + 27 =
  4. 4.37 + 22 =
  5. 5.24 + 64 =
  6. 6.86 + 78 =
  7. 7.38 + 72 =
  8. 8.62 + 23 =
  9. 9.26 + 64 =
  10. 10.84 + 26 =
  11. 11.79 + 22 =
  12. 12.37 + 45 =
  13. 13.33 + 41 =
  14. 14.51 + 32 =
  15. 15.21 + 67 =
  16. 16.71 + 31 =
  17. 17.80 + 12 =
  18. 18.64 + 56 =
  19. 19.39 + 83 =
  20. 20.81 + 84 =
  21. 21.34 + 49 =
  22. 22.53 + 51 =
  23. 23.72 + 14 =
  24. 24.89 + 16 =
  25. 25.40 + 15 =
  26. 26.21 + 35 =
  27. 27.86 + 51 =
  28. 28.71 + 78 =
  29. 29.64 + 31 =
  30. 30.40 + 86 =
  31. 31.56 + 26 =
  32. 32.50 + 17 =
  33. 33.34 + 17 =
  34. 34.80 + 38 =
  35. 35.26 + 79 =
  36. 36.38 + 78 =
  37. 37.48 + 42 =
  38. 38.81 + 87 =
  39. 39.27 + 45 =
  40. 40.58 + 31 =

Answer key

  1. 93
  2. 90
  3. 75
  4. 59
  5. 88
  6. 164
  7. 110
  8. 85
  9. 90
  10. 110
  11. 101
  12. 82
  13. 74
  14. 83
  15. 88
  16. 102
  17. 92
  18. 120
  19. 122
  20. 165
  21. 83
  22. 104
  23. 86
  24. 105
  25. 55
  26. 56
  27. 137
  28. 149
  29. 95
  30. 126
  31. 82
  32. 67
  33. 51
  34. 118
  35. 105
  36. 116
  37. 90
  38. 168
  39. 72
  40. 89

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