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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 799 · 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. 1.35 + 16 =
  2. 2.84 + 32 =
  3. 3.39 + 68 =
  4. 4.22 + 78 =
  5. 5.28 + 15 =
  6. 6.62 + 18 =
  7. 7.62 + 24 =
  8. 8.28 + 26 =
  9. 9.41 + 28 =
  10. 10.80 + 23 =
  11. 11.51 + 46 =
  12. 12.28 + 62 =
  13. 13.27 + 34 =
  14. 14.53 + 34 =
  15. 15.82 + 21 =
  16. 16.86 + 12 =
  17. 17.85 + 21 =
  18. 18.26 + 63 =
  19. 19.30 + 16 =
  20. 20.35 + 31 =
  21. 21.78 + 69 =
  22. 22.89 + 84 =
  23. 23.26 + 51 =
  24. 24.87 + 86 =
  25. 25.28 + 84 =
  26. 26.24 + 48 =
  27. 27.82 + 85 =
  28. 28.34 + 73 =
  29. 29.88 + 34 =
  30. 30.76 + 51 =
  31. 31.30 + 54 =
  32. 32.51 + 34 =
  33. 33.50 + 81 =
  34. 34.39 + 57 =
  35. 35.78 + 18 =
  36. 36.88 + 62 =
  37. 37.81 + 57 =
  38. 38.51 + 48 =
  39. 39.35 + 23 =
  40. 40.43 + 38 =

Answer key

  1. 51
  2. 116
  3. 107
  4. 100
  5. 43
  6. 80
  7. 86
  8. 54
  9. 69
  10. 103
  11. 97
  12. 90
  13. 61
  14. 87
  15. 103
  16. 98
  17. 106
  18. 89
  19. 46
  20. 66
  21. 147
  22. 173
  23. 77
  24. 173
  25. 112
  26. 72
  27. 167
  28. 107
  29. 122
  30. 127
  31. 84
  32. 85
  33. 131
  34. 96
  35. 96
  36. 150
  37. 138
  38. 99
  39. 58
  40. 81

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