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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 34 · 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. 1.65 + 67 =
  2. 2.46 + 28 =
  3. 3.22 + 75 =
  4. 4.38 + 44 =
  5. 5.34 + 34 =
  6. 6.45 + 21 =
  7. 7.78 + 33 =
  8. 8.49 + 26 =
  9. 9.39 + 13 =
  10. 10.77 + 67 =
  11. 11.69 + 38 =
  12. 12.49 + 42 =
  13. 13.84 + 27 =
  14. 14.32 + 13 =
  15. 15.33 + 21 =
  16. 16.34 + 64 =
  17. 17.51 + 83 =
  18. 18.63 + 46 =
  19. 19.86 + 25 =
  20. 20.72 + 14 =
  21. 21.68 + 21 =
  22. 22.49 + 49 =
  23. 23.39 + 61 =
  24. 24.75 + 31 =
  25. 25.69 + 49 =
  26. 26.37 + 46 =
  27. 27.21 + 23 =
  28. 28.36 + 67 =
  29. 29.68 + 89 =
  30. 30.72 + 21 =
  31. 31.47 + 85 =
  32. 32.61 + 12 =
  33. 33.48 + 14 =
  34. 34.56 + 74 =
  35. 35.35 + 31 =
  36. 36.44 + 77 =
  37. 37.68 + 84 =
  38. 38.28 + 14 =
  39. 39.69 + 24 =
  40. 40.70 + 66 =

Answer key

  1. 132
  2. 74
  3. 97
  4. 82
  5. 68
  6. 66
  7. 111
  8. 75
  9. 52
  10. 144
  11. 107
  12. 91
  13. 111
  14. 45
  15. 54
  16. 98
  17. 134
  18. 109
  19. 111
  20. 86
  21. 89
  22. 98
  23. 100
  24. 106
  25. 118
  26. 83
  27. 44
  28. 103
  29. 157
  30. 93
  31. 132
  32. 73
  33. 62
  34. 130
  35. 66
  36. 121
  37. 152
  38. 42
  39. 93
  40. 136

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