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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 671 · 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. 1.28 + 28 =
  2. 2.61 + 74 =
  3. 3.23 + 55 =
  4. 4.32 + 56 =
  5. 5.34 + 33 =
  6. 6.84 + 24 =
  7. 7.32 + 26 =
  8. 8.24 + 29 =
  9. 9.72 + 61 =
  10. 10.45 + 55 =
  11. 11.37 + 17 =
  12. 12.88 + 35 =
  13. 13.31 + 48 =
  14. 14.21 + 85 =
  15. 15.72 + 81 =
  16. 16.61 + 45 =
  17. 17.64 + 18 =
  18. 18.43 + 49 =
  19. 19.45 + 78 =
  20. 20.40 + 68 =
  21. 21.41 + 21 =
  22. 22.62 + 89 =
  23. 23.67 + 27 =
  24. 24.43 + 14 =
  25. 25.50 + 41 =
  26. 26.80 + 19 =
  27. 27.49 + 21 =
  28. 28.37 + 78 =
  29. 29.81 + 52 =
  30. 30.64 + 57 =
  31. 31.34 + 84 =
  32. 32.24 + 72 =
  33. 33.84 + 66 =
  34. 34.44 + 86 =
  35. 35.37 + 29 =
  36. 36.72 + 72 =
  37. 37.60 + 78 =
  38. 38.84 + 76 =
  39. 39.81 + 18 =
  40. 40.43 + 32 =

Answer key

  1. 56
  2. 135
  3. 78
  4. 88
  5. 67
  6. 108
  7. 58
  8. 53
  9. 133
  10. 100
  11. 54
  12. 123
  13. 79
  14. 106
  15. 153
  16. 106
  17. 82
  18. 92
  19. 123
  20. 108
  21. 62
  22. 151
  23. 94
  24. 57
  25. 91
  26. 99
  27. 70
  28. 115
  29. 133
  30. 121
  31. 118
  32. 96
  33. 150
  34. 130
  35. 66
  36. 144
  37. 138
  38. 160
  39. 99
  40. 75

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