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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 738 · 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. 1.30 + 89 =
  2. 2.61 + 51 =
  3. 3.71 + 41 =
  4. 4.22 + 64 =
  5. 5.41 + 24 =
  6. 6.69 + 29 =
  7. 7.45 + 66 =
  8. 8.44 + 31 =
  9. 9.86 + 57 =
  10. 10.31 + 64 =
  11. 11.40 + 56 =
  12. 12.64 + 22 =
  13. 13.51 + 69 =
  14. 14.82 + 42 =
  15. 15.45 + 13 =
  16. 16.27 + 21 =
  17. 17.40 + 87 =
  18. 18.37 + 53 =
  19. 19.24 + 41 =
  20. 20.40 + 21 =
  21. 21.37 + 69 =
  22. 22.35 + 81 =
  23. 23.55 + 23 =
  24. 24.32 + 44 =
  25. 25.71 + 52 =
  26. 26.65 + 82 =
  27. 27.71 + 66 =
  28. 28.73 + 84 =
  29. 29.49 + 45 =
  30. 30.36 + 61 =
  31. 31.49 + 29 =
  32. 32.82 + 77 =
  33. 33.68 + 41 =
  34. 34.79 + 76 =
  35. 35.37 + 27 =
  36. 36.67 + 29 =
  37. 37.42 + 83 =
  38. 38.33 + 42 =
  39. 39.35 + 19 =
  40. 40.22 + 38 =

Answer key

  1. 119
  2. 112
  3. 112
  4. 86
  5. 65
  6. 98
  7. 111
  8. 75
  9. 143
  10. 95
  11. 96
  12. 86
  13. 120
  14. 124
  15. 58
  16. 48
  17. 127
  18. 90
  19. 65
  20. 61
  21. 106
  22. 116
  23. 78
  24. 76
  25. 123
  26. 147
  27. 137
  28. 157
  29. 94
  30. 97
  31. 78
  32. 159
  33. 109
  34. 155
  35. 64
  36. 96
  37. 125
  38. 75
  39. 54
  40. 60

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