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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 429 · 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. 1.54 + 67 =
  2. 2.68 + 24 =
  3. 3.37 + 42 =
  4. 4.33 + 41 =
  5. 5.50 + 32 =
  6. 6.62 + 28 =
  7. 7.42 + 69 =
  8. 8.45 + 15 =
  9. 9.21 + 46 =
  10. 10.36 + 87 =
  11. 11.44 + 39 =
  12. 12.24 + 27 =
  13. 13.86 + 33 =
  14. 14.60 + 32 =
  15. 15.23 + 18 =
  16. 16.72 + 52 =
  17. 17.30 + 61 =
  18. 18.79 + 47 =
  19. 19.67 + 19 =
  20. 20.70 + 66 =
  21. 21.45 + 35 =
  22. 22.79 + 76 =
  23. 23.87 + 51 =
  24. 24.82 + 61 =
  25. 25.47 + 21 =
  26. 26.40 + 83 =
  27. 27.85 + 24 =
  28. 28.65 + 13 =
  29. 29.80 + 43 =
  30. 30.24 + 82 =
  31. 31.67 + 18 =
  32. 32.37 + 56 =
  33. 33.31 + 85 =
  34. 34.25 + 52 =
  35. 35.24 + 25 =
  36. 36.37 + 86 =
  37. 37.85 + 32 =
  38. 38.66 + 89 =
  39. 39.41 + 61 =
  40. 40.79 + 25 =

Answer key

  1. 121
  2. 92
  3. 79
  4. 74
  5. 82
  6. 90
  7. 111
  8. 60
  9. 67
  10. 123
  11. 83
  12. 51
  13. 119
  14. 92
  15. 41
  16. 124
  17. 91
  18. 126
  19. 86
  20. 136
  21. 80
  22. 155
  23. 138
  24. 143
  25. 68
  26. 123
  27. 109
  28. 78
  29. 123
  30. 106
  31. 85
  32. 93
  33. 116
  34. 77
  35. 49
  36. 123
  37. 117
  38. 155
  39. 102
  40. 104

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